feat: add test in docker.yaml

.gitea/workflows/demo.yaml

@@ -1,6 +1,7 @@
 name: Gitea Actions Demo
 run-name: ${{ gitea.actor }} is testing out Gitea Actions 🚀
-on: [push]
+on:
+  - workflow_dispatch
 
 jobs:
   Explore-Gitea-Actions:

.gitea/workflows/docker.yaml

@@ -31,6 +31,9 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
+      - name: check docker
+        run: which docker; echo $$PATH; ls /usr/bin
+
         # Set up BuildKit Docker container builder to be able to build
         # multi-platform images and export cache
         # https://`.com/docker/setup-buildx-action