Add CI.

.github/workflows/main.yml

@@ -0,0 +1,34 @@
+name: Main branch
+
+on:
+  push:
+    branches:
+      - "main"
+      - "ci"
+  pull_request:
+    branches: [ "main" ]
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+
+    name: Build and test
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Elixir
+      uses: erlef/setup-beam@61e01a43a562a89bfc54c7f9a378ff67b03e4a21 # v1.16.0
+      with:
+        elixir-version: '1.15.2' # [Required] Define the Elixir version
+        otp-version: '26.0'      # [Required] Define the Erlang/OTP version
+    - name: Restore dependencies cache
+      uses: actions/cache@v3
+      with:
+        path: deps
+        key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
+        restore-keys: ${{ runner.os }}-mix-
+    - name: Run tests
+      run: fishinthecalculator/bonfire-extension-ci-action@0.1