settings.php on platform.sh

settings.php

<?php
// ... default drupal 9 stuff...

// Include automatic Platform.sh settings.
if (file_exists(__DIR__ . '/settings.platformsh.php')) {
  require_once(__DIR__ . '/settings.platformsh.php');
}

// Include local settings. These come last so that they can override anything.
$on_platformsh = !empty($_ENV['PLATFORM_PROJECT']);
if (file_exists(__DIR__ . '/settings.local.php') && !$on_platformsh) {
  require_once(__DIR__ . '/settings.local.php');
}