[Workflow: Build] Add backend url env

.github/workflows/build.yaml

@@ -5,6 +5,7 @@ env:
   BACKEND_IMAGE_NAME: nowdb-backend
   FRONTEND_IMAGE_NAME: nowdb-frontend
 
+
 jobs:
   push_backend:
     runs-on: ubuntu-latest
@@ -26,10 +27,13 @@ jobs:
 
           # This changes all uppercase characters to lowercase.
           IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')
+
           # This strips the git ref prefix from the version.
           VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
+
           # This strips the "v" prefix from the tag name.
           [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
+
           VERSION=latest
           echo IMAGE_ID=$IMAGE_ID
           echo VERSION=$VERSION
@@ -42,8 +46,11 @@ jobs:
       contents: read
     steps:
       - uses: actions/checkout@v4
-
+      
       - name: Build image
+        env: 
+          VITE_BACKEND_URL: ${{ secrets.BACKEND_URL }}
+
         run: docker build frontend --tag $FRONTEND_IMAGE_NAME --label "runnumber=${GITHUB_RUN_ID}"
 
       - name: Log in to registry