<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<link href="./a.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<h1></h1>
<script type="text/javascript" src="./c.js"></script>
</body>
</html>var http = require("http")
var path = require("path")
var fs = require("fs")
var url = require("url")
var server = http.createServer(function(req, res){
// console.log(req)
// console.log(res)
function staticRoot(){
fs.readFile("./hello.html",function (err,fileContent){
if(err){
console.log(404)
res.writeHead(404,"not found")
res.end()
}else{
res.writeHead(200, "OK")
console.log("OK")
res.write(fileContent)
res.end()}
})}
staticRoot()
error 
