Localchat is a simple and lightweight chat application. It's primary purpose (as defined in SC-2) is to provide a means for an Off-The-Record transient chat
It is not designed to be stood up and exposed to the internet at large. Instead, the primary intended means of use is to deploy in on a new system, have user's SSH tunnel in to use it and then discard the system once that chat has completed.
In other words, it's not designed as a generic chat application, but as one to be used for clandestine chats that are hard to monitor/intercept
A full list of issues under this version can be found here
V0.0.2.1 is a minor bugfix release to resolve some issues encountered when deploying the server to Debian 9