This container can be pulled via:
  docker pull registry.opensuse.org/home/dcassany/turingpi2-rk1/containers/opensuse/tumbleed/rock64:latest
  docker pull registry.opensuse.org/home/dcassany/turingpi2-rk1/containers/opensuse/tumbleed/rock64:v0.0.1

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.