add circleci config to allow releases from branches

Author: ylembachar

.circleci/config.yml

@@ -227,8 +227,10 @@ jobs:
                 CIRCLE_BRANCH=${BRANCHES##*/}
                 echo "CIRCLE_BRANCH is empty, trying to set it from git, result: $CIRCLE_BRANCH"
               fi
-              if [[ $CIRCLE_BRANCH != "main" && ! $CIRCLE_TAG =~ (a|b|rc) ]]; then
-                echo "Final release tags are only allowed on main branch."
+              if [[ $CIRCLE_BRANCH != "main" && \
+                  ! $CIRCLE_BRANCH =~ ^release/v[0-9]+\.[0-9]+(\.[0-9]+)?$ && \
+                  ! $CIRCLE_TAG =~ (a|b|rc) ]]; then
+                echo "Final release tags are only allowed from main or release/vX.Y(.Z) branches."
                 exit 1
               else
                 DOCKER_TAG=${DOCKER_BASE}/keyper:${CIRCLE_TAG}