carbonfive/raygun — pull request #105 by christiannelson (2013-06-25 16:07:27+00:00)
Title: Recipe for rack-canonical host

In ```config.ru```, place this which is activated when the env car is set:
```
# Redirect to the custom (canonical) hostname.
use Rack::CanonicalHost, ENV['HOSTNAME'] if ENV['HOSTNAME']
```

Also, document all env vars in the app-prototype readme.