This container can be pulled via:
  docker pull registry.opensuse.org/isv/suse/edge/3.6/images/3.6/frr:10.2.1
  docker pull registry.opensuse.org/isv/suse/edge/3.6/images/3.6/frr:10.2.1-1.3

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.