Nothing is as simple as a chat server, right? Not quite, chat servers
already expose you to all the fun of asynchronous programming: how
do you handle client connecting concurrently. How do handle them disconnecting?
How do your distribute the massages?
In this tutorial, we will show you how to write one in `async-std`.
You can also find the tutorial in [our repository](https://github.com/async-rs/a-chat).