My understanding is that you want to run nodes in a container, with a pre-existing network to connect to.
If you want to do that right now, you’ll have to setup your own network, as Maidsafe don’t have one running publicly. That can be on Digital Ocean, or AWS, or wherever you want to run one. However, for the time being, you need to roll it yourself.
We have a tool that we use for launching testnets on Digital Ocean, and that’s what David is referring to. If you have some technical knowledge, it’s not too hard to use that tool to roll your own network, it’s just that you need to have your own Digital Ocean account. The tool is here.