This container can be pulled via:
  docker pull registry.opensuse.org/filesystems/ceph/pacific/images/ceph/prometheus-server:2.18.0
  docker pull registry.opensuse.org/filesystems/ceph/pacific/images/ceph/prometheus-server:2.18.0.10.121
  docker pull registry.opensuse.org/filesystems/ceph/pacific/images/ceph/prometheus-server:latest
  docker pull registry.opensuse.org/filesystems/ceph/pacific/images/ceph/prometheus-server:leap15.3

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.