docs: add license

Fixes #6

src/cli.ts

@@ -1,3 +1,18 @@
+/*
+ * Copyright (C) 2019 StApps
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
 import {execSync} from 'child_process';
 import * as config from 'config';
 import * as Dockerode from 'dockerode';
@@ -19,7 +34,7 @@ const configFile: ConfigFile = config.util.toObject();
 /**
  * Reads the container information from the docker socket and updates
  * the nginx config if necessary
- * 
+ *
  * The function will call itself again every 10s
  */
 async function updateNginxConfig() {