diff --git a/.gitea/workflows/demo.yaml b/.gitea/workflows/demo.yaml
index 24c5c42..ef1721e 100644
--- a/.gitea/workflows/demo.yaml
+++ b/.gitea/workflows/demo.yaml
@@ -20,6 +20,7 @@ jobs:
       - uses: docker/build-push-action@master
         with:
           push: false
+          file: Dockerfile
           tags: user/app:latest