This container can be pulled via:
  docker pull registry.opensuse.org/isv/suse/edge/metal3/containers/images/suse/mariadb:10.6.15.1
  docker pull registry.opensuse.org/isv/suse/edge/metal3/containers/images/suse/mariadb:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.