This container can be pulled via:
  docker pull registry.opensuse.org/home/dancermak/bci/tumbleweed/containerfile/bci/ruby:3
  docker pull registry.opensuse.org/home/dancermak/bci/tumbleweed/containerfile/bci/ruby:3.1
  docker pull registry.opensuse.org/home/dancermak/bci/tumbleweed/containerfile/bci/ruby:3.1-1.5
  docker pull registry.opensuse.org/home/dancermak/bci/tumbleweed/containerfile/bci/ruby:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.