This container can be pulled via:
  docker pull registry.opensuse.org/home/lkocman/gnuhealth/containers/opensuse/gnuhealth-server:4.0.4
  docker pull registry.opensuse.org/home/lkocman/gnuhealth/containers/opensuse/gnuhealth-server:4.0.4.5.1
  docker pull registry.opensuse.org/home/lkocman/gnuhealth/containers/opensuse/gnuhealth-server:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.