This looks pretty interesting. Could Nakama be used to build a federated, decentralized application (let's say, game world) where each user self-hosts on his own Docker instance?
The way Nakama is designed right now would not lend itself well to a decentralized game world right now. There's another project of ours which will address what you have in mind but not until the new year.
Disclaimer: I work on Nakama. :)