Azure deployment setup

.github/workflows/deploy.yml

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+name: Build and Deploy
+
+on:
+  push:
+    branches: [main]
+
+env:
+  REGISTRY: ghcr.io
+  BACKEND_IMAGE: ghcr.io/${{ github.repository_owner }}/petshop-backend
+  FRONTEND_IMAGE: ghcr.io/${{ github.repository_owner }}/petshop-web
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push backend image
+        uses: docker/build-push-action@v5
+        with:
+          context: ./backend
+          push: true
+          tags: ${{ env.BACKEND_IMAGE }}:latest
+
+      - name: Build and push frontend image
+        uses: docker/build-push-action@v5
+        with:
+          context: ./web
+          push: true
+          tags: ${{ env.FRONTEND_IMAGE }}:latest
+          build-args: |
+            NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY=${{ secrets.NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY }}
+
+      - name: Log in to Azure
+        uses: azure/login@v1
+        with:
+          creds: ${{ secrets.AZURE_CREDENTIALS }}
+
+      - name: Deploy backend
+        run: |
+          az containerapp update \
+            --name ${{ secrets.AZURE_BACKEND_APP_NAME }} \
+            --resource-group ${{ secrets.AZURE_RESOURCE_GROUP }} \
+            --image ${{ env.BACKEND_IMAGE }}:latest \
+            --registry-server ${{ env.REGISTRY }} \
+            --registry-username ${{ github.actor }} \
+            --registry-password ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Deploy frontend
+        run: |
+          az containerapp update \
+            --name ${{ secrets.AZURE_FRONTEND_APP_NAME }} \
+            --resource-group ${{ secrets.AZURE_RESOURCE_GROUP }} \
+            --image ${{ env.FRONTEND_IMAGE }}:latest \
+            --registry-server ${{ env.REGISTRY }} \
+            --registry-username ${{ github.actor }} \
+            --registry-password ${{ secrets.GITHUB_TOKEN }}