add ghcr.io push to canary docker builds

.github/workflows/docker-publish-canary.yml

@@ -6,6 +6,9 @@ on:
 jobs:
   docker:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      packages: write
 
     steps:
       - name: Checkout
@@ -19,7 +22,9 @@ jobs:
         id: meta
         uses: docker/metadata-action@v5
         with:
-          images: moonrailgun/tianji
+          images: |
+            moonrailgun/tianji
+            ghcr.io/moonrailgun/tianji
           tags: |
             type=sha
       - name: Login to DockerHub
@@ -28,6 +33,13 @@ jobs:
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Log into ghcr.io registry
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Build and push