Hardcode username.

.github/workflows/push-docker-image.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Login to Docker Hub
         uses: docker/login-action@v3
         with:
-          username: $DOCKER_USER
+          username: lcnetdev
           password: ${{ secrets.DOCKER_HUB }}
       - name: Push to Docker Hub
         run: docker push $DOCKER_USER/$REPO_NAME:${{ github.ref_name }}