This container can be pulled via:
  docker pull registry.opensuse.org/isv/suse/edge/metal3/containers/images/kube-rbac-proxy:0.18.1
  docker pull registry.opensuse.org/isv/suse/edge/metal3/containers/images/kube-rbac-proxy:0.18.1-bp156.6.1

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.