Skipping Git submodules setup$ if [[ -z "$CI_COMMIT_TAG" ]]; then # collapsed multi-line command$ /build/build.shBuilding Heroku-based application using gliderlabs/herokuish docker image...invalid reference formatinvalid reference formatinvalid argument "/master:747499a514da92714c8655a558a3f4d08aa837c3" for "-t, --tag" flag: invalid reference formatSee 'docker build --help'.ERROR: Job failed: exit code 1