This container can be pulled via:
  docker pull registry.opensuse.org/home/kzhelyazkov/metallb-images/containerfile/suse/metallb-speaker:latest
  docker pull registry.opensuse.org/home/kzhelyazkov/metallb-images/containerfile/suse/metallb-speaker:v0.13.10
  docker pull registry.opensuse.org/home/kzhelyazkov/metallb-images/containerfile/suse/metallb-speaker:v0.13.10-3.87

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.