This container can be pulled via:
  docker pull registry.opensuse.org/devel/kubic/containers/container/opensuse/haproxy:2.1.1
  docker pull registry.opensuse.org/devel/kubic/containers/container/opensuse/haproxy:2.1.1-3.20
  docker pull registry.opensuse.org/devel/kubic/containers/container/opensuse/haproxy:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.