Periodically sync golang image from dockerhub to ghcr.io

Signed-off-by: Petu Eusebiu <peusebiu@cisco.com>

.github/workflows/sync-golang-image.yaml

@@ -0,0 +1,28 @@
+name: 'Sync golang image from docker to ghcr'
+on:
+  schedule:
+    - cron: '30 1 * * *'
+  push:
+    branches:
+      - main
+
+env:
+  GOLANG_VERSION: 1.18
+
+jobs:
+  sync-golang:
+    name: 'sync'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Log in to GitHub Docker Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      
+      - name: Tag and push golang to ghcr
+        run: |
+          docker pull golang:${{ env.GOLANG_VERSION }}
+          docker tag golang:${{ env.GOLANG_VERSION }} ghcr.io/${{ github.repository_owner }}/golang:${{ env.GOLANG_VERSION }}
+          docker push ghcr.io/${{ github.repository_owner }}/golang:${{ env.GOLANG_VERSION }}