fix: use runs-on docker for Gitea runner compatibility

The Gitea runner on Mac Mini uses label 'docker', not 'ubuntu-latest'.
Also need alpine container with curl installed.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitea/workflows/deploy-coolify.yml

@@ -7,10 +7,12 @@ on:
 
 jobs:
   deploy:
-    runs-on: ubuntu-latest
+    runs-on: docker
+    container: alpine:latest
     steps:
       - name: Deploy via Coolify API
         run: |
+          apk add --no-cache curl
           echo "Deploying breakpilot-core to Coolify..."
           HTTP_STATUS=$(curl -s -o /dev/null -w "%{http_code}" \
             -X POST \