Load file HTML

const http = require('http');
const fs = require('fs');
const url = require('url');

const folderPath = __dirname + '/public_files'

http.createServer( function(request, response) {
  var baseURI = url.parse(request.url)
  var filePath = baseURI.pathname === '/' ? folderPath + '/index.html' : folderPath + baseURI.pathname

  fs.access(filePath, fs.F_OK | fs.R_OK, function(err){
    if (err) {
      response.writeHead(404, {'Content-Type':'text/html'})
      response.end('<h1>File not found</h1>')
    } else {
      fs.readFile(filePath, function(err, contenFile){
        if(!err) {
          response.writeHead(200, {'Content-Type':'text/html'})
          response.end(contenFile)
        } else {
          response.writeHead(500, {'Content-Type':'text/html'})
          response.end('<h1>Cannot read this content</h1>')
        }
      });
    }
  });

} ).listen(3000);