Update github action to build nad push images

Author: durgeshsamariya

.github/workflows/backend_ci.yml

@@ -16,9 +16,14 @@ on:
       - 'backend/**'
       - '.github/workflows/backend_ci.yml' # Trigger if this workflow file changes
 
+# Define global environment variables that can be used across jobs
+env:
+  # ACR Login Server (e.g., myregistry.azurecr.io)
+  # This needs to be set as a GitHub Repository Secret
+  ACR_LOGIN_SERVER: ${{ secrets.ACR_LOGIN_SERVER }}
 
 jobs:
-  # Define a matrix job to run checks for each backend service concurrently
+  # Job 1: Run tests and linting for all backend services
   test_and_lint_backends:
     runs-on: ubuntu-latest # Use a GitHub-hosted runner
 
@@ -133,3 +138,45 @@ jobs:
           POSTGRES_PASSWORD: postgres
         run: |
           pytest tests --maxfail=1 --disable-warnings -q
+
+  # Job 2: Build and Push Docker Images (runs only if tests pass)
+  build_and_push_images:
+    runs-on: ubuntu-latest
+    needs: test_and_lint_backends
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    # Azure login using a Service Principal secret
+    - name: Azure Login
+      uses: azure/login@v1
+      with:
+        creds: ${{ secrets.AZURE_CREDENTIALS }} # Needs to be set as a GitHub Secret (Service Principal JSON)
+
+    # Login to Azure Container Registry (ACR)
+    - name: Login to Azure Container Registry
+      run: az acr login --name ${{ env.ACR_LOGIN_SERVER }}
+
+    # Build and Push Docker image for Product Service
+    - name: Build and Push Product Service Image
+      run: |
+        docker build -t ${{ env.ACR_LOGIN_SERVER }}/product-service:latest ./backend/product_service/
+        docker push ${{ env.ACR_LOGIN_SERVER }}/product-service:latest
+
+    # Build and Push Docker image for Order Service
+    - name: Build and Push Order Service Image
+      run: |
+        docker build -t ${{ env.ACR_LOGIN_SERVER }}/order-service:latest ./backend/order_service/
+        docker push ${{ env.ACR_LOGIN_SERVER }}/order-service:latest
+
+    # Build and Push Docker image for Customer Service
+    - name: Build and Push Customer Service Image
+      run: |
+        docker build -t ${{ env.ACR_LOGIN_SERVER }}/customer-service:latest ./backend/customer_service/
+        docker push ${{ env.ACR_LOGIN_SERVER }}/customer-service:latest
+
+    # Logout from Azure for security (runs even if image push fails)
+    - name: Logout from Azure
+      run: az logout
+      if: always()