First download and start the Brayns renderer:
docker pull bluebrain/brayns
docker run -ti --rm -p 8200:8200 bluebrain/brayns
Then download the corresponding web UI:
docker pull bluebrain/sauron
docker run -ti --rm -p 8080:8080 bluebrain/sauron
And connect to the UI using the following address:
http://localhost:8080/?host=localhost:8200
That's it, you're done! Enjoy, and crontribute! :-)