This container can be pulled via:
  docker pull registry.opensuse.org/home/rbrownsuse/containers/containerfile/opensuse/distrobox-greybeard:0.16.5
  docker pull registry.opensuse.org/home/rbrownsuse/containers/containerfile/opensuse/distrobox-greybeard:0.16.5.5.881
  docker pull registry.opensuse.org/home/rbrownsuse/containers/containerfile/opensuse/distrobox-greybeard:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.