This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/opensuse/mariadb:10.3.20
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/opensuse/mariadb:10.3.20-5.203
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/opensuse/mariadb:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.