first commit

历届学生/王凯/XiaoShuo/xiaoshuo-backend/_.js

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+const express = require('express')
+const router = express.Router()
+const http = require('./http')
+const utils = require('./utils')
+const config = require('./config')
+const mysql = require('yn-mysql-utils')
+const md5 = require('md5')
+
+let db = new mysql(config.mysql)
+
+
+module.exports = { express , router, http , utils, config, db, md5}