Great article, I'm not extremely versed in Docker, but it left me with a better understanding of the process. Thanks!
Took a fair while to write and edit, but it was well worth it. Docker is a great tool, and the more I use it the more I love it. Would definitely recommend a try if you have some spare tome soon.
As far as I know, you can only SSH into containers by running `docker attach {$id/$name}` or `sudo lxc-attach {$id}`.
Dockerfiles might be helpful for you though – they can take care of booting instances as and when needed?