Add AWS deep learning README

[resdntalien]

Notes from running Orbyter-dl-dev:3.2 in AWS

1. You have to use an Ubuntu Deep Learning AMI. Our Docker container does not work with Amazon Linux (as far as we’ve tested).
2. We have tested on the g4dn.xlarge EC2 instance. It works there. Pretty sure it should work on the other GPU enabled instances as well.
3. You need to install docker compose. Follow the instructions here: https://docs.docker.com/compose/install/. i.e. it's some curl commands.
4. After installing docker compose, you need to edit the /etc/docker/daemon.json file so that the default runtime is set FIRST. If you don’t make it first, then the container will not pick up the runtime. Don’t make that mistake #devops. Here’s what the file should look like after editing:

{
    "default-runtime": "nvidia",
    "runtimes": {
        "nvidia": {
            "path": "nvidia-container-runtime",
            "runtimeArgs": []
        }
    },
}