Update prod.yml

Author: siwonpada

.github/workflows/prod.yml

@@ -48,7 +48,8 @@ jobs:
         id: push
         uses: docker/build-push-action@v6
         with:
-          context: ./api.Dockerfile
+          context: .
+          file: ./api.Dockerfile
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}