package.json

{
  "name": "node",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "eslint": "^2.11.1",
    "eslint-config-airbnb-base": "^3.0.1",
    "eslint-plugin-import": "^1.8.1",
    "nodemon": "^1.9.2"
  },
  "dependencies": {
    "fs": "0.0.2",
    "mime-types": "^2.1.11",
    "nconf": "^0.8.4"
  }
}

server.js

const http = require('http');
const fs = require('fs');
const path = require('path');
const mime = require('mime-types');

http.createServer((request, response) => {
  let filePath = path.join('public', request.url);
  if (filePath === path.join('public/')) {
    filePath = path.join('public', 'index.html');
  }
  const extname = path.extname(filePath);
  const contentType = mime.contentType(extname);

  fs.exists(filePath, (exists) => {
    if (exists) {
      const readStream = fs.createReadStream(filePath);
      readStream.pipe(response);
      readStream.on('end', () => {
        response.writeHead(200, { 'Content-Type': contentType });
      });
    } else {
      fs.readFile(path.join('public', '404.html'), (err, data) => {
        if (err) throw err;
        response.writeHead(404, { 'Content-Type': contentType });
        response.end(data);
      });
    }
  });
}).listen(8000);
console.log('Server running at http://127.0.0.1:8000/');