This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/arm/totest/containers/opensuse/toolbox:8.3.1
  docker pull registry.opensuse.org/opensuse/factory/arm/totest/containers/opensuse/toolbox:8.3.1-3.473
  docker pull registry.opensuse.org/opensuse/factory/arm/totest/containers/opensuse/toolbox:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.