Update azure-pipelines.yml for Azure Pipelines

Author: vip-git

azure-pipelines.yml

@@ -43,6 +43,11 @@ jobs:
     ## End multi-container
 
     steps:
+    - script: |
+        npm install
+        npm run build:frontend
+        npm run build:backend:ci
+      displayName: 'npm build'
     - script: |
         sudo snap install --classic heroku
         heroku login