diff --git a/.forgejo/workflows/check.yml b/.forgejo/workflows/check.yml
index 8552eb6..9d564eb 100644
--- a/.forgejo/workflows/check.yml
+++ b/.forgejo/workflows/check.yml
@@ -6,7 +6,8 @@ on:
 jobs:
   checks:
     runs-on: docker
-    container.image: ghcr.io/catthehacker/ubuntu:act-22.04
+    container:
+      image: ghcr.io/catthehacker/ubuntu:act-22.04
     env:
       DIRECTORY: config
     steps:
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..e69de29