500 (Internal Server Error) 访问部署在新浪云上的nodejs服务器总是会报错,请大神

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• 项目入口文件 */ const http = require("http"); const express = require("express");

//创建服务器
let port = 5050;
let app = express();
http.createServer(app).listen(port);

/***************************中间件***************************/

let cors = require("cors");
let bodyParser = require("body-parser");
let cookieParser = require("cookie-parser");
app.use(cors({
origin:"*",
credentials:true
}));

app.use(bodyParser.urlencoded({
extended:false
}));

app.use(cookieParser());

/*************************路由&路由器************************/
app.use("/user",require("./routes/user"));