web/app/config.example.php

<?php
return [
    'root_url' => '/public/',
    'database' => [
        'name' => 'mysql',
        'args' => [
            'host' => '127.0.0.1',
            'database' => 'test',
            'user' => 'root',
            'password' => '',
            'charset' => 'utf8mb4',
        ],
   ],
];