This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/postgres:15
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/postgres:15-27.10
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/postgres:15.8

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.