This container can be pulled via:
  docker pull registry.opensuse.org/devel/bci/sle-15-sp3/images/bci/ruby:2
  docker pull registry.opensuse.org/devel/bci/sle-15-sp3/images/bci/ruby:2-19.17
  docker pull registry.opensuse.org/devel/bci/sle-15-sp3/images/bci/ruby:2.5
  docker pull registry.opensuse.org/devel/bci/sle-15-sp3/images/bci/ruby:2.5-19.17

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.