if [ "${CI_COMMIT_REF_NAME}" != "$(echo ${CI_COMMIT_REF_NAME} | sed 's/[^a-zA-Z0-9._]/-/g')" ]; then
echo "Branch names must follow docker tag rules. Only use ASCII (lower or upper case), digits, underscores, periods and dashes. Your current branch name is '${CI_COMMIT_REF_NAME}'. A suggestion is '$(echo ${CI_COMMIT_REF_NAME} | sed 's/[^a-zA-Z0-9._]/-/g')'"