```ruby
require 'application'

use Rack::Session::Cookie
use Rack::ShowExceptions

run Application```

Use the Rack::Static middleware for serving the static public folder.
user
```ruby
require 'application'

use Rack::Session::Cookie
use Rack::ShowExceptions
use Rack::Static, :urls => [ '/favicon.ico', '/css' ], :root => "public"

run Application```
assistant