nextcloud_minimalprofile/lib/AppInfo/Application.php

<?php

declare(strict_types=1);

namespace OCA\MinimalProfile\AppInfo;

use OCP\AppFramework\App;
use OCP\AppFramework\Bootstrap\IBootContext;
use OCP\AppFramework\Bootstrap\IBootstrap;
use OCP\AppFramework\Bootstrap\IRegistrationContext;
use OCP\Util;

class Application extends App implements IBootstrap {

	public const APP_ID = 'minimalprofile';

	public function __construct(array $urlParams = []) {
		parent::__construct(self::APP_ID, $urlParams);
	}

	public function register(IRegistrationContext $context): void {
	}

	public function boot(IBootContext $context): void {
		// Load CSS from our css/ folder using standard Util::addStyle
		// This loads css/minimalprofile.css
		Util::addStyle('minimalprofile', 'minimalprofile');
		
		file_put_contents('/tmp/minimalprofile.log', date('Y-m-d H:i:s') . ' boot, loaded style' . "\n", FILE_APPEND);
	}
}