Add Azure deployment workflow for backend subfolder

Author: gopalepic

.github/workflows/azure-webapps-node.yml

@@ -0,0 +1,62 @@
+name: Build and deploy Node.js app to Azure Web App - calendar-integration-backend
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read #This is required for actions/checkout
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Node.js version
+        uses: actions/setup-node@v3
+        with:
+          node-version: '22.x'
+
+      - name: npm install, build, and generate
+        run: |
+          cd backend
+          npm install
+          npm run build
+          npm run generate
+
+      - name: Upload artifact for deployment job
+        uses: actions/upload-artifact@v4
+        with:
+          name: node-app
+          path: backend
+
+  deploy:
+    runs-on: ubuntu-latest
+    needs: build
+    permissions:
+      id-token: write #This is required for requesting the JWT
+      contents: read #This is required for actions/checkout
+
+    steps:
+      - name: Download artifact from build job
+        uses: actions/download-artifact@v4
+        with:
+          name: node-app
+      
+      - name: Login to Azure
+        uses: azure/login@v2
+        with:
+          client-id: ${{ secrets.__clientidsecretname__ }}
+          tenant-id: ${{ secrets.__tenantidsecretname__ }}
+          subscription-id: ${{ secrets.__subscriptionidsecretname__ }}
+
+      - name: 'Deploy to Azure Web App'
+        id: deploy-to-webapp
+        uses: azure/webapps-deploy@v3
+        with:
+          app-name: 'calendar-integration-backend'
+          slot-name: 'Production'
+          package: .