diff --git a/.eslintrc b/.eslintrc
index 5addee2..28c4248 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -5,6 +5,9 @@
     "no-console": 0,
     "comma-dangle": 0,
     "require-jsdoc": 0,
+    "no-useless-escape": 0,
+    "indent": 0,
+    "prefer-const": 0
   },
   "parserOptions": {
     "ecmaVersion": 6
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..647f4de
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,13 @@
+on: [push,pull_request]
+name: Test
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js
+      uses: actions/setup-node@v2
+    - name: Install dependencies
+      run: npm install
+    - name: Run test
+      run: npm test
\ No newline at end of file
diff --git a/README.md b/README.md
index 59ee71f..121f808 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Push Notifications codelab
 
-Code for the Web Fundamentals [Push Notifications codelab](https://developers.google.com/web/fundamentals/getting-started/push-notifications/?hl=en).
+Code for the Web Fundamentals [Push Notifications codelab](https://codelabs.developers.google.com/codelabs/push-notifications/).
 
 In this codelab, you'll learn how to add Push Notifications to web applications. This will enable you to re-engage users with breaking news and information about
 new content.
diff --git a/app/favicon.ico b/app/favicon.ico
new file mode 100644
index 0000000..92e7f88
Binary files /dev/null and b/app/favicon.ico differ
diff --git a/app/index.html b/app/index.html
index 57862d9..7fc3f37 100644
--- a/app/index.html
+++ b/app/index.html
@@ -32,7 +32,7 @@ <h1>Push Codelab</h1>
       server to store in a database so that when you want to send a message
       you can lookup the subscription and send a message to it.</p>
       <p>To simplify things for this code lab copy the following details
-      into the <a href="https://web-push-codelab.appspot.com/">Push Companion
+      into the <a href="https://web-push-codelab.glitch.me//">Push Companion
       Site</a> and it'll send a push message for you, using the application
       server keys on the site - so make sure they match.</p>
       <pre><code class="js-subscription-json"></code></pre>
diff --git a/companion-site/README.md b/companion-site/README.md
deleted file mode 100644
index d5c7503..0000000
--- a/companion-site/README.md
+++ /dev/null
@@ -1,17 +0,0 @@
-This is a companion site that can be used to generate application server keys and trigger push messages.
-
-Install pip:
-
-    sudo easy_install -U pip
-
-Install dependencies with:
-
-    pip install -t third_party -r requirements.txt
-
-To run companion site locally:
-
-   node app.js
-
-To deploy:
-
-    npm run deploy
diff --git a/companion-site/app.js b/companion-site/app.js
deleted file mode 100644
index feaf083..0000000
--- a/companion-site/app.js
+++ /dev/null
@@ -1,64 +0,0 @@
-// Copyright 2015-2016, Google, Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-/* eslint-env node */
-'use strict';
-
-const express = require('express');
-const bodyParser = require('body-parser');
-const webpush = require('web-push');
-
-const app = express();
-
-// Parse JSON body
-app.use(bodyParser.json());
-
-app.post('/api/send-push-msg', (req, res) => {
-  const options = {
-    vapidDetails: {
-      subject: 'https://developers.google.com/web/fundamentals/',
-      publicKey: req.body.applicationKeys.public,
-      privateKey: req.body.applicationKeys.private
-    },
-    // 1 hour in seconds.
-    TTL: 60 * 60
-  };
-
-  console.log(req.body);
-
-  webpush.sendNotification(
-    req.body.subscription,
-    req.body.data,
-    options
-  )
-  .then(() => {
-    res.status(200).send({success: true});
-  })
-  .catch((err) => {
-    if (err.statusCode) {
-      res.status(err.statusCode).send(err.body);
-    } else {
-      res.status(400).send(err.message);
-    }
-  });
-});
-
-app.use('/', express.static('static'));
-
-// Start the server
-const server = app.listen(process.env.PORT || '8080', () => {
-  console.log('App listening on port %s', server.address().port);
-  console.log('Press Ctrl+C to quit.');
-});
-// [END app]
diff --git a/companion-site/app.yaml b/companion-site/app.yaml
deleted file mode 100644
index 2504bb2..0000000
--- a/companion-site/app.yaml
+++ /dev/null
@@ -1,21 +0,0 @@
-# Copyright 2015-2016, Google, Inc.
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# [START app_yaml]
-runtime: nodejs
-vm: true
-handlers:
-- url: /.*
-  script: IGNORED
-  secure: always
-# [END app_yaml]
diff --git a/companion-site/package.json b/companion-site/package.json
deleted file mode 100644
index 7a020c8..0000000
--- a/companion-site/package.json
+++ /dev/null
@@ -1,21 +0,0 @@
-{
-  "name": "web-push-codelab",
-  "description": "The companion for the web push codelab.",
-  "version": "0.0.1",
-  "private": true,
-  "license": "Apache Version 2.0",
-  "author": "Google Inc.",
-  "engines": {
-    "node": "~4.2"
-  },
-  "scripts": {
-    "start": "node app.js",
-    "monitor": "nodemon app.js",
-    "deploy": "gcloud app deploy"
-  },
-  "dependencies": {
-    "body-parser": "^1.15.2",
-    "express": "^4.13.4",
-    "web-push": "^3.1.0"
-  }
-}
diff --git a/companion-site/static/index.html b/companion-site/static/index.html
deleted file mode 100644
index 57e8777..0000000
--- a/companion-site/static/index.html
+++ /dev/null
@@ -1,68 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-  <meta charset="utf-8">
-  <meta http-equiv="X-UA-Compatible" content="IE=edge">
-  <meta name="viewport" content="width=device-width, initial-scale=1.0">
-
-  <title>Push Companion</title>
-
-  <link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
-  <link rel="stylesheet" href="https://code.getmdl.io/1.2.1/material.indigo-pink.min.css">
-  <script defer src="https://code.getmdl.io/1.2.1/material.min.js"></script>
-  <link rel="stylesheet" href="styles/index.css">
-</head>
-
-<body>
-
-  <header>
-    <h1>Push Companion</h1>
-  </header>
-
-  <main>
-    <h3>Application Server Keys</h3>
-    <p>Application server keys are used to idenitfy your application server
-      with a push service.</p>
-
-    <p><strong>Public Key</strong></p>
-    <pre><code class="js-public-key">Loading...</code></pre>
-
-    <p><strong>Private Key</strong></p>
-    <pre><code class="js-private-key">Loading...</code></pre>
-
-    <p>
-      <button disabled class="js-refresh-keys mdl-button mdl-js-button mdl-button--raised mdl-js-ripple-effect">
-        Refresh Keys
-      </button>
-    </p>
-
-    <hr />
-
-    <h3>Send a Push Message</h3>
-
-    <p><strong>Subscription to Send To</strong></p>
-    <div class="mdl-textfield mdl-js-textfield">
-      <textarea class="mdl-textfield__input" type="text" rows= "3" id="push-subscription" ></textarea>
-      <label class="mdl-textfield__label" for="push-subscription">Add Push Subscription Here....</label>
-    </div>
-
-    <p><strong>Text to Send</strong></p>
-    <div class="mdl-textfield mdl-js-textfield">
-      <textarea class="mdl-textfield__input" type="text" rows= "3" id="push-data" ></textarea>
-      <label class="mdl-textfield__label" for="push-data">Add Push Text Here....</label>
-    </div>
-
-    <p>
-      <button disabled class="js-send-push mdl-button mdl-js-button mdl-button--raised mdl-js-ripple-effect">
-        Send Push Message
-      </button>
-    </p>
-
-  </main>
-
-  <script src="scripts/application-server-key.js"></script>
-  <script src="scripts/send-message.js"></script>
-
-  <script src="https://code.getmdl.io/1.2.1/material.min.js"></script>
-</body>
-</html>
diff --git a/companion-site/static/scripts/application-server-key.js b/companion-site/static/scripts/application-server-key.js
deleted file mode 100644
index 0c68636..0000000
--- a/companion-site/static/scripts/application-server-key.js
+++ /dev/null
@@ -1,131 +0,0 @@
-/* eslint-env browser, es6 */
-
-function base64UrlToUint8Array(base64UrlData) {
-  const padding = '='.repeat((4 - base64UrlData.length % 4) % 4);
-  const base64 = (base64UrlData + padding)
-    .replace(/\-/g, '+')
-    .replace(/_/g, '/');
-
-  const rawData = window.atob(base64);
-  const buffer = new Uint8Array(rawData.length);
-
-  for (let i = 0; i < rawData.length; ++i) {
-    buffer[i] = rawData.charCodeAt(i);
-  }
-  return buffer;
-}
-
-function uint8ArrayToBase64Url(uint8Array, start, end) {
-  start = start || 0;
-  end = end || uint8Array.byteLength;
-
-  const base64 = window.btoa(
-    String.fromCharCode.apply(null, uint8Array.subarray(start, end)));
-  return base64
-    .replace(/\=/g, '') // eslint-disable-line no-useless-escape
-    .replace(/\+/g, '-')
-    .replace(/\//g, '_');
-}
-
-function cryptoKeyToUrlBase64(publicKey, privateKey) {
-  const promises = [];
-  promises.push(
-    crypto.subtle.exportKey('jwk', publicKey)
-    .then((jwk) => {
-      const x = base64UrlToUint8Array(jwk.x);
-      const y = base64UrlToUint8Array(jwk.y);
-
-      const publicKey = new Uint8Array(65);
-      publicKey.set([0x04], 0);
-      publicKey.set(x, 1);
-      publicKey.set(y, 33);
-
-      return publicKey;
-    })
-  );
-
-  promises.push(
-    crypto.subtle
-      .exportKey('jwk', privateKey)
-    .then((jwk) => {
-      return base64UrlToUint8Array(jwk.d);
-    })
-  );
-
-  return Promise.all(promises)
-  .then((exportedKeys) => {
-    return {
-      public: uint8ArrayToBase64Url(exportedKeys[0]),
-      private: uint8ArrayToBase64Url(exportedKeys[1]),
-    };
-  });
-}
-
-function generateNewKeys() {
-  return crypto.subtle.generateKey({name: 'ECDH', namedCurve: 'P-256'},
-    true, ['deriveBits'])
-  .then((keys) => {
-    return cryptoKeyToUrlBase64(keys.publicKey, keys.privateKey);
-  });
-}
-
-function clearKeys() {
-  window.localStorage.removeItem('server-keys');
-}
-
-function storeKeys(keys) {
-  window.localStorage.setItem('server-keys', JSON.stringify(keys));
-}
-
-function getStoredKeys() {
-  const storage = window.localStorage.getItem('server-keys');
-  if (storage) {
-    return JSON.parse(storage);
-  }
-
-  return null;
-}
-
-function displayKeys(keys) {
-  const publicElement = document.querySelector('.js-public-key');
-  const privateElement = document.querySelector('.js-private-key');
-  const refreshBtn = document.querySelector('.js-refresh-keys');
-
-  publicElement.textContent = keys.public;
-  privateElement.textContent = keys.private;
-
-  refreshBtn.disabled = false;
-}
-
-function updateKeys() {
-  let storedKeys = getStoredKeys();
-  let promiseChain = Promise.resolve(storedKeys);
-  if (!storedKeys) {
-    promiseChain = generateNewKeys()
-    .then((newKeys) => {
-      storeKeys(newKeys);
-      return newKeys;
-    });
-  }
-
-  return promiseChain.then((keys) => {
-    displayKeys(keys);
-  });
-}
-
-function initialiseKeys() {
-  const refreshBtn = document.querySelector('.js-refresh-keys');
-  refreshBtn.addEventListener('click', function() {
-    refreshBtn.disabled = true;
-
-    clearKeys();
-
-    updateKeys();
-  });
-
-  updateKeys();
-}
-
-window.addEventListener('load', () => {
-  initialiseKeys();
-});
diff --git a/companion-site/static/scripts/send-message.js b/companion-site/static/scripts/send-message.js
deleted file mode 100644
index f99e6ab..0000000
--- a/companion-site/static/scripts/send-message.js
+++ /dev/null
@@ -1,103 +0,0 @@
-/* eslint-env browser,  es6 */
-
-function getDetails() {
-  const details = window.localStorage.getItem('last-known-details');
-  try {
-    if (details) {
-      return JSON.parse(details);
-    }
-  } catch (err) {
-    // NOOP
-  }
-  return null;
-}
-
-function saveDetails(details) {
-  window.localStorage.setItem('last-known-details',
-    JSON.stringify(details));
-}
-
-function sendPushMessage() {
-  const subscriptionTextArea = document.querySelector('#push-subscription');
-  const textToSendTextArea = document.querySelector('#push-data');
-
-  const subscriptionString = subscriptionTextArea.value.trim();
-  const dataString = textToSendTextArea.value;
-
-  saveDetails({
-    subscription: subscriptionString,
-    data: dataString
-  });
-
-  if (subscriptionString.length === 0 ) {
-    return Promise.reject(new Error('Please provide a push subscription.'));
-  }
-
-  let subscriptionObject = null;
-  try {
-    subscriptionObject = JSON.parse(subscriptionString);
-  } catch (err) {
-    return Promise.reject(new Error('Unable to parse subscription as JSON'));
-  }
-
-  if (!subscriptionObject.endpoint) {
-    return Promise.reject(new Error('The subscription MUST have an endpoint'));
-  }
-
-  const publicElement = document.querySelector('.js-public-key');
-  const privateElement = document.querySelector('.js-private-key');
-
-  return fetch('/api/send-push-msg', {
-    method: 'POST',
-    headers: {
-      'Content-Type': 'application/json'
-    },
-    body: JSON.stringify({
-      subscription: subscriptionObject,
-      data: dataString,
-      applicationKeys: {
-        public: publicElement.textContent,
-        private: privateElement.textContent,
-      }
-    })
-  })
-  .then((response) => {
-    if (response.status !== 200) {
-      return response.text()
-      .then((responseText) => {
-        throw new Error(responseText);
-      });
-    }
-  });
-}
-
-function initialiseUI() {
-  const sendBtn = document.querySelector('.js-send-push');
-  sendBtn.addEventListener('click', () => {
-    sendBtn.disabled = true;
-
-    sendPushMessage()
-    .catch((err) => {
-      console.error(err);
-      window.alert(err.message);
-    })
-    .then(() => {
-      sendBtn.disabled = false;
-    });
-  });
-
-  const previousDetails = getDetails();
-  if (previousDetails) {
-    const subscriptionTextArea = document.querySelector('#push-subscription');
-    const textToSendTextArea = document.querySelector('#push-data');
-
-    subscriptionTextArea.value = previousDetails.subscription;
-    textToSendTextArea.value = previousDetails.data;
-  }
-
-  sendBtn.disabled = false;
-}
-
-window.addEventListener('load', () => {
-  initialiseUI();
-});
diff --git a/companion-site/static/styles/index.css b/companion-site/static/styles/index.css
deleted file mode 100644
index 3ae8e1f..0000000
--- a/companion-site/static/styles/index.css
+++ /dev/null
@@ -1,42 +0,0 @@
-html {
-  height: 100%;
-}
-
-html, body {
-  width: 100%;
-  padding: 0;
-  margin: 0;
-}
-
-body {
-  min-height: auto;
-  box-sizing: border-box;
-}
-
-header {
-  padding: 115px 16px 32px 16px;
-  box-sizing: border-box;
-  background-color: #37474f;
-  color: white;
-}
-
-main, header > h1 {
-  max-width: 760px;
-  margin: 0 auto;
-}
-
-main {
-  padding: 24px 0;
-}
-
-pre {
-  white-space: pre-wrap;
-}
-
-.mdl-textfield {
-  width: 100%;
-}
-
-.mdl-textfield__input {
-  min-height: 116px;
-}
diff --git a/completed/01-register-sw/index.html b/completed/01-register-sw/index.html
index 57862d9..6213e54 100644
--- a/completed/01-register-sw/index.html
+++ b/completed/01-register-sw/index.html
@@ -32,7 +32,7 @@ <h1>Push Codelab</h1>
       server to store in a database so that when you want to send a message
       you can lookup the subscription and send a message to it.</p>
       <p>To simplify things for this code lab copy the following details
-      into the <a href="https://web-push-codelab.appspot.com/">Push Companion
+      into the <a href="https://web-push-codelab.glitch.me/">Push Companion
       Site</a> and it'll send a push message for you, using the application
       server keys on the site - so make sure they match.</p>
       <pre><code class="js-subscription-json"></code></pre>
diff --git a/completed/02-subscription-state/index.html b/completed/02-subscription-state/index.html
index 57862d9..6213e54 100644
--- a/completed/02-subscription-state/index.html
+++ b/completed/02-subscription-state/index.html
@@ -32,7 +32,7 @@ <h1>Push Codelab</h1>
       server to store in a database so that when you want to send a message
       you can lookup the subscription and send a message to it.</p>
       <p>To simplify things for this code lab copy the following details
-      into the <a href="https://web-push-codelab.appspot.com/">Push Companion
+      into the <a href="https://web-push-codelab.glitch.me/">Push Companion
       Site</a> and it'll send a push message for you, using the application
       server keys on the site - so make sure they match.</p>
       <pre><code class="js-subscription-json"></code></pre>
diff --git a/completed/02-subscription-state/scripts/main.js b/completed/02-subscription-state/scripts/main.js
index 3168550..0e206ef 100644
--- a/completed/02-subscription-state/scripts/main.js
+++ b/completed/02-subscription-state/scripts/main.js
@@ -55,7 +55,7 @@ function updateBtn() {
   pushButton.disabled = false;
 }
 
-function initialiseUI() {
+function initializeUI() {
   // Set the initial subscription value
   swRegistration.pushManager.getSubscription()
   .then(function(subscription) {
@@ -79,7 +79,7 @@ if ('serviceWorker' in navigator && 'PushManager' in window) {
     console.log('Service Worker is registered', swReg);
 
     swRegistration = swReg;
-    initialiseUI();
+    initializeUI();
   })
   .catch(function(error) {
     console.error('Service Worker Error', error);
diff --git a/completed/03-subscribe/index.html b/completed/03-subscribe/index.html
index 57862d9..6213e54 100644
--- a/completed/03-subscribe/index.html
+++ b/completed/03-subscribe/index.html
@@ -32,7 +32,7 @@ <h1>Push Codelab</h1>
       server to store in a database so that when you want to send a message
       you can lookup the subscription and send a message to it.</p>
       <p>To simplify things for this code lab copy the following details
-      into the <a href="https://web-push-codelab.appspot.com/">Push Companion
+      into the <a href="https://web-push-codelab.glitch.me/">Push Companion
       Site</a> and it'll send a push message for you, using the application
       server keys on the site - so make sure they match.</p>
       <pre><code class="js-subscription-json"></code></pre>
diff --git a/completed/03-subscribe/scripts/main.js b/completed/03-subscribe/scripts/main.js
index ddf32b2..173fd23 100644
--- a/completed/03-subscribe/scripts/main.js
+++ b/completed/03-subscribe/scripts/main.js
@@ -76,7 +76,7 @@ function subscribeUser() {
     applicationServerKey: applicationServerKey
   })
   .then(function(subscription) {
-    console.log('User is subscribed:', subscription);
+    console.log('User is subscribed');
 
     updateSubscriptionOnServer(subscription);
 
@@ -90,7 +90,7 @@ function subscribeUser() {
   });
 }
 
-function initialiseUI() {
+function initializeUI() {
   pushButton.addEventListener('click', function() {
     pushButton.disabled = true;
     if (isSubscribed) {
@@ -125,7 +125,7 @@ if ('serviceWorker' in navigator && 'PushManager' in window) {
     console.log('Service Worker is registered', swReg);
 
     swRegistration = swReg;
-    initialiseUI();
+    initializeUI();
   })
   .catch(function(error) {
     console.error('Service Worker Error', error);
diff --git a/completed/04-permission-denied/index.html b/completed/04-permission-denied/index.html
index 57862d9..6213e54 100644
--- a/completed/04-permission-denied/index.html
+++ b/completed/04-permission-denied/index.html
@@ -32,7 +32,7 @@ <h1>Push Codelab</h1>
       server to store in a database so that when you want to send a message
       you can lookup the subscription and send a message to it.</p>
       <p>To simplify things for this code lab copy the following details
-      into the <a href="https://web-push-codelab.appspot.com/">Push Companion
+      into the <a href="https://web-push-codelab.glitch.me/">Push Companion
       Site</a> and it'll send a push message for you, using the application
       server keys on the site - so make sure they match.</p>
       <pre><code class="js-subscription-json"></code></pre>
diff --git a/completed/04-permission-denied/scripts/main.js b/completed/04-permission-denied/scripts/main.js
index 4023aad..c2a7fc8 100644
--- a/completed/04-permission-denied/scripts/main.js
+++ b/completed/04-permission-denied/scripts/main.js
@@ -83,7 +83,7 @@ function subscribeUser() {
     applicationServerKey: applicationServerKey
   })
   .then(function(subscription) {
-    console.log('User is subscribed:', subscription);
+    console.log('User is subscribed.');
 
     updateSubscriptionOnServer(subscription);
 
@@ -97,7 +97,7 @@ function subscribeUser() {
   });
 }
 
-function initialiseUI() {
+function initializeUI() {
   pushButton.addEventListener('click', function() {
     pushButton.disabled = true;
     if (isSubscribed) {
@@ -132,7 +132,7 @@ if ('serviceWorker' in navigator && 'PushManager' in window) {
     console.log('Service Worker is registered', swReg);
 
     swRegistration = swReg;
-    initialiseUI();
+    initializeUI();
   })
   .catch(function(error) {
     console.error('Service Worker Error', error);
diff --git a/completed/05-push-event/index.html b/completed/05-push-event/index.html
index 57862d9..6213e54 100644
--- a/completed/05-push-event/index.html
+++ b/completed/05-push-event/index.html
@@ -32,7 +32,7 @@ <h1>Push Codelab</h1>
       server to store in a database so that when you want to send a message
       you can lookup the subscription and send a message to it.</p>
       <p>To simplify things for this code lab copy the following details
-      into the <a href="https://web-push-codelab.appspot.com/">Push Companion
+      into the <a href="https://web-push-codelab.glitch.me/">Push Companion
       Site</a> and it'll send a push message for you, using the application
       server keys on the site - so make sure they match.</p>
       <pre><code class="js-subscription-json"></code></pre>
diff --git a/completed/05-push-event/scripts/main.js b/completed/05-push-event/scripts/main.js
index 4023aad..1836ae3 100644
--- a/completed/05-push-event/scripts/main.js
+++ b/completed/05-push-event/scripts/main.js
@@ -83,7 +83,7 @@ function subscribeUser() {
     applicationServerKey: applicationServerKey
   })
   .then(function(subscription) {
-    console.log('User is subscribed:', subscription);
+    console.log('User is subscribed');
 
     updateSubscriptionOnServer(subscription);
 
@@ -97,7 +97,7 @@ function subscribeUser() {
   });
 }
 
-function initialiseUI() {
+function initializeUI() {
   pushButton.addEventListener('click', function() {
     pushButton.disabled = true;
     if (isSubscribed) {
@@ -132,7 +132,7 @@ if ('serviceWorker' in navigator && 'PushManager' in window) {
     console.log('Service Worker is registered', swReg);
 
     swRegistration = swReg;
-    initialiseUI();
+    initializeUI();
   })
   .catch(function(error) {
     console.error('Service Worker Error', error);
diff --git a/completed/06-click/index.html b/completed/06-click/index.html
index 57862d9..6213e54 100644
--- a/completed/06-click/index.html
+++ b/completed/06-click/index.html
@@ -32,7 +32,7 @@ <h1>Push Codelab</h1>
       server to store in a database so that when you want to send a message
       you can lookup the subscription and send a message to it.</p>
       <p>To simplify things for this code lab copy the following details
-      into the <a href="https://web-push-codelab.appspot.com/">Push Companion
+      into the <a href="https://web-push-codelab.glitch.me/">Push Companion
       Site</a> and it'll send a push message for you, using the application
       server keys on the site - so make sure they match.</p>
       <pre><code class="js-subscription-json"></code></pre>
diff --git a/completed/06-click/scripts/main.js b/completed/06-click/scripts/main.js
index 4023aad..c2a7fc8 100644
--- a/completed/06-click/scripts/main.js
+++ b/completed/06-click/scripts/main.js
@@ -83,7 +83,7 @@ function subscribeUser() {
     applicationServerKey: applicationServerKey
   })
   .then(function(subscription) {
-    console.log('User is subscribed:', subscription);
+    console.log('User is subscribed.');
 
     updateSubscriptionOnServer(subscription);
 
@@ -97,7 +97,7 @@ function subscribeUser() {
   });
 }
 
-function initialiseUI() {
+function initializeUI() {
   pushButton.addEventListener('click', function() {
     pushButton.disabled = true;
     if (isSubscribed) {
@@ -132,7 +132,7 @@ if ('serviceWorker' in navigator && 'PushManager' in window) {
     console.log('Service Worker is registered', swReg);
 
     swRegistration = swReg;
-    initialiseUI();
+    initializeUI();
   })
   .catch(function(error) {
     console.error('Service Worker Error', error);
diff --git a/completed/07-unsubscribe/index.html b/completed/07-unsubscribe/index.html
index 57862d9..6213e54 100644
--- a/completed/07-unsubscribe/index.html
+++ b/completed/07-unsubscribe/index.html
@@ -32,7 +32,7 @@ <h1>Push Codelab</h1>
       server to store in a database so that when you want to send a message
       you can lookup the subscription and send a message to it.</p>
       <p>To simplify things for this code lab copy the following details
-      into the <a href="https://web-push-codelab.appspot.com/">Push Companion
+      into the <a href="https://web-push-codelab.glitch.me/">Push Companion
       Site</a> and it'll send a push message for you, using the application
       server keys on the site - so make sure they match.</p>
       <pre><code class="js-subscription-json"></code></pre>
diff --git a/completed/07-unsubscribe/scripts/main.js b/completed/07-unsubscribe/scripts/main.js
index 09d2e4c..27bdb6f 100644
--- a/completed/07-unsubscribe/scripts/main.js
+++ b/completed/07-unsubscribe/scripts/main.js
@@ -83,7 +83,7 @@ function subscribeUser() {
     applicationServerKey: applicationServerKey
   })
   .then(function(subscription) {
-    console.log('User is subscribed:', subscription);
+    console.log('User is subscribed.');
 
     updateSubscriptionOnServer(subscription);
 
@@ -117,7 +117,7 @@ function unsubscribeUser() {
   });
 }
 
-function initialiseUI() {
+function initializeUI() {
   pushButton.addEventListener('click', function() {
     pushButton.disabled = true;
     if (isSubscribed) {
@@ -152,7 +152,7 @@ if ('serviceWorker' in navigator && 'PushManager' in window) {
     console.log('Service Worker is registered', swReg);
 
     swRegistration = swReg;
-    initialiseUI();
+    initializeUI();
   })
   .catch(function(error) {
     console.error('Service Worker Error', error);
diff --git a/completed/08-push-subscription-change/index.html b/completed/08-push-subscription-change/index.html
index 57862d9..6213e54 100644
--- a/completed/08-push-subscription-change/index.html
+++ b/completed/08-push-subscription-change/index.html
@@ -32,7 +32,7 @@ <h1>Push Codelab</h1>
       server to store in a database so that when you want to send a message
       you can lookup the subscription and send a message to it.</p>
       <p>To simplify things for this code lab copy the following details
-      into the <a href="https://web-push-codelab.appspot.com/">Push Companion
+      into the <a href="https://web-push-codelab.glitch.me/">Push Companion
       Site</a> and it'll send a push message for you, using the application
       server keys on the site - so make sure they match.</p>
       <pre><code class="js-subscription-json"></code></pre>
diff --git a/completed/08-push-subscription-change/scripts/main.js b/completed/08-push-subscription-change/scripts/main.js
index cb2be8f..bb6a31b 100644
--- a/completed/08-push-subscription-change/scripts/main.js
+++ b/completed/08-push-subscription-change/scripts/main.js
@@ -21,8 +21,8 @@
 
 'use strict';
 
-const applicationServerPublicKey = 'BJPMaDrbRiUzH8IeMvRMn7CcxFMIQzTEB1j62Kn' +
-  'gB5irgMhB9TPgcmMjwB7t1aRkUKDwzz9MMH3ASEKLKX_mqjk';
+const applicationServerPublicKey = 'BHdd2PwLOsYaDQQOmqw_8KIIYOQYECWN' +
+  'lat0K8GScnytjV88e6Xifn0GMz7MbScAkxf_kVJhnp-0NrB_P4u6WHw';
 
 const pushButton = document.querySelector('.js-push-btn');
 
@@ -83,7 +83,7 @@ function subscribeUser() {
     applicationServerKey: applicationServerKey
   })
   .then(function(subscription) {
-    console.log('User is subscribed:', subscription);
+    console.log('User is subscribed.');
 
     updateSubscriptionOnServer(subscription);
 
@@ -117,7 +117,7 @@ function unsubscribeUser() {
   });
 }
 
-function initialiseUI() {
+function initializeUI() {
   pushButton.addEventListener('click', function() {
     pushButton.disabled = true;
     if (isSubscribed) {
@@ -152,7 +152,7 @@ if ('serviceWorker' in navigator && 'PushManager' in window) {
     console.log('Service Worker is registered', swReg);
 
     swRegistration = swReg;
-    initialiseUI();
+    initializeUI();
   })
   .catch(function(error) {
     console.error('Service Worker Error', error);
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..2bd780b
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,2541 @@
+{
+  "name": "push-notifications",
+  "version": "1.0.0",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "push-notifications",
+      "version": "1.0.0",
+      "license": "Apache 2",
+      "devDependencies": {
+        "eslint": "^6.0.1",
+        "eslint-config-google": "^0.13.0"
+      }
+    },
+    "node_modules/@babel/code-frame": {
+      "version": "7.14.5",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.14.5.tgz",
+      "integrity": "sha512-9pzDqyc6OLDaqe+zbACgFkb6fKMNG6CObKpnYXChRsvYGyEdc7CA2BaqeOM+vOtCS5ndmJicPJhKAwYRI6UfFw==",
+      "dev": true,
+      "dependencies": {
+        "@babel/highlight": "^7.14.5"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@babel/helper-validator-identifier": {
+      "version": "7.14.9",
+      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.14.9.tgz",
+      "integrity": "sha512-pQYxPY0UP6IHISRitNe8bsijHex4TWZXi2HwKVsjPiltzlhse2znVcm9Ace510VT1kxIHjGJCZZQBX2gJDbo0g==",
+      "dev": true,
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@babel/highlight": {
+      "version": "7.14.5",
+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.14.5.tgz",
+      "integrity": "sha512-qf9u2WFWVV0MppaL877j2dBtQIDgmidgjGk5VIMw3OadXvYaXn66U1BFlH2t4+t3i+8PhedppRv+i40ABzd+gg==",
+      "dev": true,
+      "dependencies": {
+        "@babel/helper-validator-identifier": "^7.14.5",
+        "chalk": "^2.0.0",
+        "js-tokens": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/acorn": {
+      "version": "7.4.1",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.4.1.tgz",
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+      "dev": true,
+      "bin": {
+        "acorn": "bin/acorn"
+      },
+      "engines": {
+        "node": ">=0.4.0"
+      }
+    },
+    "node_modules/acorn-jsx": {
+      "version": "5.3.2",
+      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.3.2.tgz",
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+      "dev": true,
+      "peerDependencies": {
+        "acorn": "^6.0.0 || ^7.0.0 || ^8.0.0"
+      }
+    },
+    "node_modules/ajv": {
+      "version": "6.12.6",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
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+      "dev": true,
+      "dependencies": {
+        "fast-deep-equal": "^3.1.1",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/epoberezkin"
+      }
+    },
+    "node_modules/ansi-escapes": {
+      "version": "4.3.2",
+      "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-4.3.2.tgz",
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+      },
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+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
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+        "which": "^1.2.9"
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+      "dev": true,
+      "bin": {
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+      "dependencies": {
+        "ms": "2.1.2"
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+      "engines": {
+        "node": ">=6.0"
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+      "peerDependenciesMeta": {
+        "supports-color": {
+          "optional": true
+        }
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+      "resolved": "https://registry.npmjs.org/deep-is/-/deep-is-0.1.3.tgz",
+      "integrity": "sha1-s2nW+128E+7PUk+RsHD+7cNXzzQ=",
+      "dev": true
+    },
+    "node_modules/doctrine": {
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+      "resolved": "https://registry.npmjs.org/doctrine/-/doctrine-3.0.0.tgz",
+      "integrity": "sha512-yS+Q5i3hBf7GBkd4KG8a7eBNNWNGLTaEwwYWUijIYM7zrlYDM0BFXHjjPWlWZ1Rg7UaddZeIDmi9jF3HmqiQ2w==",
+      "dev": true,
+      "dependencies": {
+        "esutils": "^2.0.2"
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diff --git a/package.json b/package.json
index c47506f..938d3d5 100644
--- a/package.json
+++ b/package.json
@@ -3,13 +3,12 @@
   "version": "1.0.0",
   "description": "Push notifications codelab.",
   "scripts": {
-    "lint": "eslint '.'",
-    "test": "npm run lint",
-    "deploy": "gcloud app deploy"
+    "lint": "eslint \".\"",
+    "test": "npm run lint"
   },
   "devDependencies": {
-    "eslint": "^3.8.1",
-    "eslint-config-google": "^0.7.0"
+    "eslint": "^6.0.1",
+    "eslint-config-google": "^0.13.0"
   },
   "repository": {
     "type": "git",
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