Server

http.createServer(function (req, res) {

    let url = "";
    let type = "text/html";
    if (req.url.endsWith(".css")) {
        url = "." + req.url;
        type = "text/css";
    } else if (req.url.endsWith(".js")) {
        url = "." + req.url;
        type = "text/javascript";
    } else {
        url = "pages" + (req.url=="/"?"/index":req.url) + ".html";
    }
    console.log(url);
    fs.readFile(url, function (err, data) {
        if (!err) {
            res.writeHead(200, { "Content-Type": type });
            res.end(data);
        }
        else {
            res.writeHead(404, { "Content-Type": "text/html" });
            res.end("<h1>Not found</h1>");
        }
    });
}).listen(port);