This container can be pulled via:
  docker pull registry.opensuse.org/devel/kubic/containers/container/kubic/metallb-controller:0.8.3
  docker pull registry.opensuse.org/devel/kubic/containers/container/kubic/metallb-controller:0.8.3-5.531
  docker pull registry.opensuse.org/devel/kubic/containers/container/kubic/metallb-controller:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.