This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/nfs-server:2.6.4
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/nfs-server:2.6.4-4.50
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/nfs-server:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.