chore: Add license

cron-runner.js

@@ -1,3 +1,16 @@
+/*
+ * Copyright (C) 2025 Jakub Žitník
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
 import cron from 'node-cron';
 import { exec } from 'child_process';
 import { scheduleRules, toMinutes } from './scheduleRules.js';