This container can be pulled via:
  docker pull registry.opensuse.org/isv/suse/edge/metal3/containers/images/mariadb:10.11.6.1
  docker pull registry.opensuse.org/isv/suse/edge/metal3/containers/images/mariadb:10.11.6.1-bp156.2.1
  docker pull registry.opensuse.org/isv/suse/edge/metal3/containers/images/mariadb:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.