fix: Add 'use strict' on app.js

a60814billy · a60814billy · commit 4738ba7d3641 · 2017-05-08T19:29:07.000+08:00
diff --git a/app.js b/app.js
@@ -1,3 +1,4 @@
+'use strict'
 // app
 // external modules
 var express = require('express')
