Problem: testground image uploaded flow is not aligned in release (#1629)

Author: mmsqe

.github/workflows/container.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - main
+      - release/**
     tags:
       - "v*.*.*"
 
@@ -34,8 +35,7 @@ jobs:
           # login to ghcr.io
           echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
 
-          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
-          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
+          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,' | sed -e 's/^v//')
           [ "$VERSION" == "main" ] && VERSION=latest
           echo "VERSION: $VERSION"