This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/postgres:13
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/postgres:13.18
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/postgres:13.18-31.17

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.