Can't seem to find a way to use the route.php from 5.2 from laravel 5.2 to 8.83.25 web.php

I'm pretty new with Laravel, was able to work on finding a tutorial but it uses a 5.2 version.

I'm trying to convert the older version to 8.83.25

This is the route in the tutorial that I'm following. I have created the CategoryController.php manually

Route::group(['middleware' => ['web']], function(){
    Route::get('category', 'CategoryController');
});

enter image description here

via Chebli Mohamed