This container can be pulled via:
  docker pull registry.opensuse.org/home/dancermak/branches/devel/bci/sle-15-sp4/containerfile/bci/ruby:2
  docker pull registry.opensuse.org/home/dancermak/branches/devel/bci/sle-15-sp4/containerfile/bci/ruby:2-94.77
  docker pull registry.opensuse.org/home/dancermak/branches/devel/bci/sle-15-sp4/containerfile/bci/ruby:2.5
  docker pull registry.opensuse.org/home/dancermak/branches/devel/bci/sle-15-sp4/containerfile/bci/ruby:2.5-94.77

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.