Upstream sync

.github/workflows/sync_upstream.yml

@@ -0,0 +1,45 @@
+name: Sync Fork with Upstream
+on:
+  schedule:
+    - cron: "30 23 * * *"
+  workflow_dispatch:
+
+permissions: 
+  contents: write
+
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Git user
+        run: |
+          git config --global user.name "Arne Tarara - Automated"
+          git config --global user.email "[email protected]"
+
+      - name: Add remote repository
+        run: |
+          git remote add upstream https://github.com/wagtail/bakerydemo
+          git fetch upstream
+
+      - name: Check for updates
+        run: |
+          CHANGES=$(git rev-list HEAD..upstream/main --count)
+          if [ "$CHANGES" -gt 0 ]; then
+            echo "Updating fork main branch..."
+            git checkout main
+            git merge upstream/main
+            git push
+
+            echo "Updating fork gmt-pinned-versions branch..."
+            git checkout gmt-pinned-versions
+            git merge upstream/main
+            git push
+          else
+            echo "No updates from the original repository."
+          fi
+