This container can be pulled via:
  docker pull registry.opensuse.org/home/rbrownsuse/containers/containerfile/opensuse/distrobox-greybeard:0.17.0
  docker pull registry.opensuse.org/home/rbrownsuse/containers/containerfile/opensuse/distrobox-greybeard:0.17.0.5.1181
  docker pull registry.opensuse.org/home/rbrownsuse/containers/containerfile/opensuse/distrobox-greybeard:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.