Automated client cgroup adoption #1
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…ser's UID and GID
…ker cli's PID making request
…rs/create requests
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I add a "connection context" to the http server initialization. With this context, whenever a connection is made, it reads the SO_PEERCRED of the user that wrote to the docker.sock file to get the user's PID (PID of the docker cli command). Then it reads /proc/$PID/cgroup to get their cgroup and parses it. It then adds the HostConfig option, CgroupParent, which is what the command line arg --cgroup-parent= would translate to. This forces the container to have the Slurm provided cgroup and ensures that a user can only see the GPUs that they requested, and thus cannot interfere with others work by accident.