fix(CI): fix the dockerfile name

Author: fuzsh

.github/workflows/docker-build.yml

@@ -33,7 +33,7 @@ jobs:
         uses: docker/build-push-action@v4
         with:
           context: .
-          file: Dockerfile.prod
+          file: Dockerfile
           push: true
           tags: |
             ${{ env.BACKEND_IMAGE_NAME }}:latest