upgrade version 2.0,add login api,upgrade api verison,add document and unit test

router/search.js

@@ -0,0 +1,20 @@
+const express = require("express")
+const router = express()
+const { createRequest } = require("../util/util")
+
+router.get("/", (req, res) => {
+  const keywords = req.query.keywords
+  const type = req.query.type || 1
+  const limit = req.query.limit || 30
+  const data = 's=' + keywords + '&limit=' + limit + '&type=' + type + '&offset=0'
+  createRequest('/api/search/pc/', 'POST', data)
+    .then(result => {
+      res.setHeader("Content-Type", "application/json")
+      res.send(result)
+    })
+    .catch(err => {
+      res.status(502).send('fetch error')
+    })
+})
+
+module.exports = router