This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/legacyarm/totest/containers/opensuse/bci/ruby:4.0-base
  docker pull registry.opensuse.org/opensuse/factory/legacyarm/totest/containers/opensuse/bci/ruby:4.0-base-8.9

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.