This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/kubic/kube-proxy:v1.28.16
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/kubic/kube-proxy:v1.28.16-2.88

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.