docker build/push for pushes to release/* branches

Author: GFJHogue

.github/workflows/ci.yml

@@ -9,6 +9,7 @@ on:
   push:
     branches:
       - main
+      - release/*
 
 permissions:
   id-token: write
@@ -81,7 +82,7 @@ jobs:
                 path: /tmp/image.tar
 
     docker-push:
-        if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
+        if: ${{ github.event_name == 'push' && (github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/heads/release/')) }}
         needs: docker-build
         runs-on: ubuntu-latest