Create mirror.yml

Author: jmrplens

.github/workflows/mirror.yml

@@ -0,0 +1,21 @@
+name: Mirror to gitlab
+
+on:
+  push:
+    branches: [ main, master ]
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:                     # <-- must use actions/checkout before mirroring!
+    - uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+    - uses: pixta-dev/repository-mirroring-action@v1
+      with:
+        target_repo_url:
+          ssh://git@git.jmrp.io:${{ secrets.PORT }}/${{ github.repository }}.git
+        ssh_private_key:                              # <-- use 'secrets' to pass credential information.
+          ${{ secrets.GITLAB_SSH_PRIVATE_KEY }}