add node-cleanup to trap bot code exit

README.md

@@ -27,6 +27,8 @@ Wechaty is a Bot Framework for Wechat **Personal** Account which can help you cr
 
 > @naishstar: thanks for great SDK [link](https://github.com/wechaty/wechaty/issues/57)
 
+> @shevyan: 简单的接口...和Docker化的封装，结合Docker绝对是一个不错的选择 [link](http://mp.weixin.qq.com/s/o-4VMcAMz0K8yJVdNaUXow)
+
 # Example
 
 The shortest wechat bot code in the world: 6 lines JavaScript

example/ding-dong-bot.ts

@@ -8,7 +8,8 @@
  */
 
 /* tslint:disable:variable-name */
-const QrcodeTerminal = require('qrcode-terminal')
+const QrcodeTerminal  = require('qrcode-terminal')
+const nodeCleanup     = require('node-cleanup')
 
 import {
   Wechaty
@@ -77,6 +78,10 @@ bot.init()
   process.exit(-1)
 })
 
+nodeCleanup(() => {
+  bot.say('quit')
+})
+
 function logToFile(data) {
   require('fs').appendFile('message.log', data + '\n\n#############################\n\n', err => {
     if (err) { log.error('LogToFile: %s', err) }

package.json

@@ -125,6 +125,7 @@
     "eslint": "^3.4.0",
     "eslint-plugin-ava": "^3.1.1",
     "fluent-ffmpeg": "^2.1.0",
+    "node-cleanup": "^1.0.1",
     "nyc": "^8.3.2",
     "qrcode-terminal": "^0.10.0",
     "request": "^2.79.0",