New lines in config to enable installation from ui

Install/Templates/config.php

@@ -8,3 +8,7 @@ define('DB_USERNAME', 'kanboard_app');
 define('DB_PASSWORD', 'pot4toes!');
 define('DB_HOSTNAME', 'localhost');
 define('DB_NAME', 'kanboard_db');
+
+// Plugins
+define('PLUGINS_DIR', 'data/plugins');
+define('PLUGIN_INSTALLER', true);