This container can be pulled via:
  docker pull registry.opensuse.org/kubic/kube-controller-manager:latest
  docker pull registry.opensuse.org/kubic/kube-controller-manager:v1.31.2
  docker pull registry.opensuse.org/kubic/kube-controller-manager:v1.31.2-6.40

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.