This container can be pulled via:
  docker pull registry.opensuse.org/home/mbelur/bci/powerdns/containerfile/suse/pdns-recursor:4.6.1
  docker pull registry.opensuse.org/home/mbelur/bci/powerdns/containerfile/suse/pdns-recursor:4.6.1-bp154.9.105
  docker pull registry.opensuse.org/home/mbelur/bci/powerdns/containerfile/suse/pdns-recursor:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.