where to config database in production in laravel?

after laravel is deployed to a server. Somehow even I configured root/config/database.php

    'mysql' => [
        'driver' => 'mysql',
        'host' => env('DB_HOST', 'localhost'),
        'port' => env('DB_PORT', '3306'),
        'database' => env('DB_DATABASE', 'changed to my db name'),
        'username' => env('DB_USERNAME', 'changed username'),
        'password' => env('DB_PASSWORD', 'changed password'),
        'charset' => 'utf8',
        'collation' => 'utf8_unicode_ci',
        'prefix' => '',
        'strict' => true,
        'engine' => null,
    ],

I changed the three fields above. Shouldn't that the only config need to be done in order to setup the database in production?

Is there anything that I am missing about laravel 5.3?