This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/kubic/kube-proxy:v1.28.13
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/kubic/kube-proxy:v1.28.13-2.61

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.