Update main.yml

Author: Ranjeetvit453

.github/workflows/main.yml

@@ -18,6 +18,6 @@ jobs:
         uses: docker/build-push-action@v4
         with:
           context: .
-          file: ./docker/Dockerfile.backend
+          file: ./Dockerfile.backend
           push: true
           tags: 100xdevs/user-app-backend:${{ github.sha }}