Using ngrok with puma-dev

If you have a local Rails/Rack server running using [puma-dev](https://github.com/puma/puma-dev), e.g. `http://gomus.test` and you want to use [ngrok](https://ngrok.com) for accessing this server from remote, you can pass a `--host-header=gomus.test` to ngrok.

```
ngrok http --host-header=gomus.test localhost:80
```

Happy hacking!

alexanderpresber
September 28, 2020