index.js

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

const PORT = process.env.PORT || 8080;
const mimeTypes = {
  '.html': 'text/html',
  '.js': 'text/javascript',
  '.css': 'text/css',
  '.json': 'application/json',
  '.png': 'image/png',
  '.jpg': 'image/jpg',
  '.gif': 'image/gif',
  '.svg': 'image/svg+xml',
  '.wav': 'audio/wav',
  '.mp4': 'video/mp4',
  '.woff': 'application/font-woff',
  '.ttf': 'application/font-ttf',
  '.eot': 'application/vnd.ms-fontobject',
  '.otf': 'application/font-otf',
  '.wasm': 'application/wasm'
};
http.createServer(function (request, response) {
  let filePath = '.' + request.url;
  if (filePath == './') {
    filePath = './index.html';
  }

  const extname = String(path.extname(filePath)).toLowerCase();
  const contentType = mimeTypes[extname] || 'application/octet-stream';

  fs.readFile(filePath, function (error, content) {
    if (error) {
      if (error.code == 'ENOENT') {
        response.writeHead(404);
        response.end('Not Found');
      } else {
        response.writeHead(500);
        response.end('Sorry, check with the site admin for error: ' + error.code + ' ..\n');
      }
    } else {
      response.writeHead(200, {
        'Content-Type': contentType
      });
      response.end(content, 'utf-8');
    }
  });
}).listen(PORT)
console.log(`Listening on http://localhost:${PORT}/`);