This container can be pulled via:
  docker pull registry.opensuse.org/isv/suse/edge/3.5/images/3.5/frr:10.2.1
  docker pull registry.opensuse.org/isv/suse/edge/3.5/images/3.5/frr:10.2.1-2.1

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.