This container can be pulled via:
  docker pull registry.opensuse.org/home/fcrozat/opensuse-devstacks/containers_tw/opensuse/openjdk:15
  docker pull registry.opensuse.org/home/fcrozat/opensuse-devstacks/containers_tw/opensuse/openjdk:15.0.3
  docker pull registry.opensuse.org/home/fcrozat/opensuse-devstacks/containers_tw/opensuse/openjdk:15.0.3.6.18

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.