Docker compose equivalent of `docker run –gpu=all` option

After trying it and solving a myriad of problems along the way, I have realized that it is simply the documentation that is out of date.

Adding the following yaml block to my docker-compose.yml resulted in nvidia-smi being available to use.

    deploy:
      resources:
        reservations:
          devices:
            - driver: nvidia
              count: 1
              capabilities: [gpu]