This container can be pulled via:
  docker pull registry.opensuse.org/isv/suse/edge/containers/images/kube-rbac-proxy:0.22.1
  docker pull registry.opensuse.org/isv/suse/edge/containers/images/kube-rbac-proxy:0.22.1-295.8

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.