You first need to follow the given steps:
Install a new FuelPHP instance.
Configure Apache and your host file to handle it. In this chapter, we will access our application by requesting
http://mytest.app.Update Composer if necessary.
Create a new database for your application.
Configure FuelPHP in order to allow your application to access this database.
These steps have been covered in Chapter 1, Building Your First FuelPHP Application, so you might want to take a look at it.