diff --git a/.gitea/workflows/demo.yaml b/.gitea/workflows/demo.yaml
index 38686ac..c552e8a 100644
--- a/.gitea/workflows/demo.yaml
+++ b/.gitea/workflows/demo.yaml
@@ -29,3 +29,6 @@ jobs:
         - /data:/data
       options:
         entrypoint: /bin/sh
+    steps:
+      - name: Check for dockerenv file
+        run: (ls /.dockerenv && echo Found dockerenv) || (echo No dockerenv)