This container can be pulled via:
  docker pull registry.opensuse.org/devel/kubic/containers/container/opensuse/haproxy:3.1.6
  docker pull registry.opensuse.org/devel/kubic/containers/container/opensuse/haproxy:3.1.6-16.304
  docker pull registry.opensuse.org/devel/kubic/containers/container/opensuse/haproxy:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.