Structure

assets/

Your application's assets (CSS/SASS, JS, etc.)

bin/

Binary or executable files

config/

This is where you can configure your application before the handling of a request. You can configure your database connections, declare services in the container, define your database schema, etc.

container.php	This is where you can register services in the container
controllers.php	Here you can declare your controllers in the container (for simpler routing or using a controller as a service)
handlers.php	Customize error handlers here
middleware.php	Add global middleware here (middleware that will be executed at the beginning of all requests)
routes.php	Put your application routes (or include routing files) here
sentinel.php	Cartalyst Sentinel authentication library configuration file
services.php	Your application's configuration
services.dev.php	Development environment configuration
slim.php	Slim settings