ci: route images by workflow host

Co-authored-by: multica-agent <github@multica.ai>

.github/workflows/docker-publish.yml

@@ -8,7 +8,7 @@ on:
     branches: [main, master]
 
 env:
-  REGISTRY: ghcr.io
+  REGISTRY: ${{ github.server_url == 'https://github.com' && 'ghcr.io' || 'git.ipao.vip' }}
   IMAGE_NAME: ${{ github.repository }}
 
 jobs:
@@ -28,7 +28,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      - name: Log in to GHCR
+      - name: Log in to container registry
         if: github.event_name != 'pull_request'
         uses: docker/login-action@v3
         with: