github workflow file bug fixed

.github/workflows/publish.vscode.yml

@@ -66,8 +66,19 @@ jobs:
           echo "VERSION=${VERSION}" >> $GITHUB_OUTPUT
           echo "Version: ${VERSION}"
 
+      - name: Check for Docker Hub credentials
+        id: docker_creds
+        env:
+          DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+        run: |
+          if [ -n "${DOCKERHUB_USERNAME}" ]; then
+            echo "HAS_CREDENTIALS=true" >> $GITHUB_OUTPUT
+          else
+            echo "HAS_CREDENTIALS=false" >> $GITHUB_OUTPUT
+          fi
+
       - name: Log in to Docker Hub (if credentials provided)
-        if: ${{ secrets.DOCKERHUB_USERNAME }}
+        if: steps.docker_creds.outputs.HAS_CREDENTIALS == 'true'
         uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}