Docker container running Docker as daemon.
Supported Docker versions include a SET command which is not present in the "official" release (see hqhq's PR).
Docker daemon listens both on a Unix socket and on port 2375.
docker run --privileged --name docset docset:<version> [OPTIONS]
OPTIONS are the one that can be passed on Docker daemon start.
Default ones are
-dD -H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock
To execute a shell inside the container:
docker exec -it docset bash