Use JavaScript Standard Style

Introduce JavaScript Standard Style as project style rule,
and fixed all fail on backend code.

lib/models/temp.js

@@ -1,19 +1,17 @@
-"use strict";
-
-//external modules
-var shortId = require('shortid');
+// external modules
+var shortId = require('shortid')
 
 module.exports = function (sequelize, DataTypes) {
-    var Temp = sequelize.define("Temp", {
-        id: {
-            type: DataTypes.STRING,
-            primaryKey: true,
-            defaultValue: shortId.generate
-        },
-        data: {
-            type: DataTypes.TEXT
-        }
-    });
-    
-    return Temp;
-};
+  var Temp = sequelize.define('Temp', {
+    id: {
+      type: DataTypes.STRING,
+      primaryKey: true,
+      defaultValue: shortId.generate
+    },
+    data: {
+      type: DataTypes.TEXT
+    }
+  })
+
+  return Temp
+}