This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/bci/ruby:3
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/bci/ruby:3.3
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/bci/ruby:3.3-21.9
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/bci/ruby:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.