This container can be pulled via:
  docker pull registry.opensuse.org/devel/bci/tumbleweed/containerfile/opensuse/bci/ruby:4
  docker pull registry.opensuse.org/devel/bci/tumbleweed/containerfile/opensuse/bci/ruby:4.0
  docker pull registry.opensuse.org/devel/bci/tumbleweed/containerfile/opensuse/bci/ruby:4.0-3.3
  docker pull registry.opensuse.org/devel/bci/tumbleweed/containerfile/opensuse/bci/ruby:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.