Append "-dev" suffix for the image tag of release branches

Append "-dev" suffix for the image tag of release branches: release-1.0-dev

Signed-off-by: Wenkai Yin(尹文开) <yinw@vmware.com>

hack/docker-push.sh

@@ -71,6 +71,9 @@ if [[ ! -z "$TAG" ]]; then
 else
     echo "We're on branch $BRANCH"
     VERSION="$BRANCH"
+    if [[ "$VERSION" == release-* ]]; then
+      VERSION=${VERSION}-dev
+    fi
 fi
 
 if [[ -z "$BUILDX_PLATFORMS" ]]; then
@@ -82,6 +85,7 @@ echo "Highest tag found: $HIGHEST"
 echo "BRANCH: $BRANCH"
 echo "TAG: $TAG"
 echo "TAG_LATEST: $TAG_LATEST"
+echo "VERSION: $VERSION"
 echo "BUILDX_PLATFORMS: $BUILDX_PLATFORMS"
 
 echo "Building and pushing container images."