add puppet service comments for explaination

examples/ding-dong-bot.ts

@@ -34,6 +34,23 @@ import { generate } from 'qrcode-terminal'
  */
 const bot = new Wechaty({
   name : 'ding-dong-bot',
+  
+  /**
+   * You can specify different puppet for different IM protocols.
+   * Learn more from https://wechaty.js.org/docs/puppet-providers/
+   */
+  // puppet: 'wechaty-puppet-whatsapp'
+  
+  /**
+   * You can use wechaty puppet provider 'wechaty-puppet-service'
+   *   which can connect to Wechaty Puppet Services
+   *   for using more powerful protocol.
+   * Learn more about services (and TOKEN)from https://wechaty.js.org/docs/puppet-services/
+   */
+  // puppet: 'wechaty-puppet-service'
+  // puppetOptions: {
+  //   token: 'xxx',
+  // }
 })
 
 /**