This container can be pulled via:
  docker pull registry.opensuse.org/isv/metal3/bci/external-dns/containerfile/suse/external-dns:0.13.4
  docker pull registry.opensuse.org/isv/metal3/bci/external-dns/containerfile/suse/external-dns:0.13.4-1.149
  docker pull registry.opensuse.org/isv/metal3/bci/external-dns/containerfile/suse/external-dns:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.