add mirroring ci

.github/workflows/mirroring.yml

@@ -0,0 +1,19 @@
+name: GitlabSync
+
+on:
+  - push
+  - delete
+
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+    name: Git Repo Sync
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+    - uses: wangchucheng/[email protected]
+      with:
+        target-url: ${{ secrets.GITLAB_URL }}
+        target-username: ${{ secrets.GITLAB_USERNAME }}
+        target-token: ${{ secrets.GITLAB_TOKEN }}