docker: invalid reference format: repository name must be lowercase.

[gitmujoshi]

I am trying to follow along your class DevSecOps: Automated Security Testing on Lynda but after doing build, I am unable to run gautlt-docker due this issue:

bash-3.2$ gauntlt-docker --help
docker: invalid reference format: repository name must be lowercase.
See 'docker run --help'.

invalid reference format: repository name must be lowercase