This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/postgres:13
  docker pull registry.opensuse.org/opensuse/postgres:13-11.9
  docker pull registry.opensuse.org/opensuse/postgres:13.15
  docker pull registry.opensuse.org/opensuse/postgres:13.15-11.9

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.