Add GitHub workflow to build update

.github/workflows/update.yaml

@@ -0,0 +1,45 @@
+name: Update loffice-365
+
+on:
+  workflow_dispatch:
+  push:
+    tags:
+      - '**'
+
+jobs:
+  update:
+    name: Update loffice-365
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Setup Node
+        uses: actions/setup-node@v3
+        with:
+          node-version: "18"
+          cache: "npm"
+
+      - name: Install dependencies
+        run: |
+          npm install
+          
+          NATIVEFIER_VERSION=$(npm view nativefier version)
+          echo "NATIVEFIER_VERSION=$NATIVEFIER_VERSION" >> $GITHUB_ENV
+
+      - name: Build
+        run: |
+          npm run build
+
+      - name: Upload binaries/loffice-365.tgz
+        uses: actions/upload-artifact@v2
+        with:
+          name: loffice-365.tgz
+          path: binaries/loffice-365.tgz
+
+      - name: Upload to GitHub release
+        uses: svenstaro/upload-release-action@v2
+        if: ${{ startsWith(github.ref, 'refs/tags/') }}
+        with:
+          repo_token: ${{ secrets.GITHUB_TOKEN }}
+          file: binaries/loffice-365.tgz