Fix build issue in backend-ci.yml

.github/workflows/backend-ci.yml

@@ -28,6 +28,7 @@ jobs:
       # Run dotnet build and publish
       - name: dotnet build and publish
         run: |
+          cd backend
           dotnet restore
           dotnet build --configuration Release
           dotnet publish --configuration Release --output '${{ env.AZURE_WEBAPP_PACKAGE_PATH }}/backend-app'
@@ -38,4 +39,5 @@ jobs:
         with:
           app-name: ${{ env.AZURE_WEBAPP_NAME }} 
           publish-profile: ${{ secrets.AZURE_WEBAPP_PUBLISH_PROFILE }}
+          B
           package: '${{ env.AZURE_WEBAPP_PACKAGE_PATH }}/backend-app'