test: remove DOCKERFILE

1 job for master in 39 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Build
failed build #47843

00:00:39

 
Name Stage Failure
failed
build Build
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store

$ docker pull $IMAGE:latest || true
invalid reference format
$ docker build --cache-from $IMAGE:latest --tag $IMAGE:$CI_COMMIT_SHA --tag $IMAGE:latest .
invalid argument ":542678654c91ada4beae29892cf6a6a2ef3021c2" for "-t, --tag" flag: invalid reference format
See 'docker build --help'.
ERROR: Job failed: exit code 125