launch index.php each time. You'll need to create your own private.php file, and within it, put the following line :
$db_config = [
'name' => 'YOUR_DB_NAME',
'host' => 'YOUR_HOST',
'user' => 'YOUR_ADMIN_USERNAME',
'pass' => 'YOUR_ADMIN_PASSWORD'
];

PS : (Don't forget the <?php at the beginning of this private.php file, obviously...)
This file should be put in the config folder.

TODO : avoid access to forbidden files via /.. (url rewrite???)
add a go to root button (easier navigation...)