Skipping Git submodules setup$ # Auto DevOps variables and functions # collapsed multi-line command$ /build/build.shBuilding Heroku-based application using gliderlabs/herokuish docker image...invalid reference formatinvalid reference formatinvalid argument "/master:0fcef7e8a42355561256d1f4740a0f6bfeac3819" for "-t, --tag" flag: invalid reference formatSee 'docker build --help'.ERROR: Job failed: exit code 1