This container can be pulled via:
  docker pull registry.opensuse.org/home/nbelouin/factorytesting/images/kube-rbac-proxy:0.18.1
  docker pull registry.opensuse.org/home/nbelouin/factorytesting/images/kube-rbac-proxy:0.18.1-1.3

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.