This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/rmt-mariadb:11.0
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/rmt-mariadb:11.0-2.22
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/rmt-mariadb:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.