toste

app.js

const http = require('http');

function check(request, response) {
  if (request.url === '/favicon.ico') {
    response.writeHead(200, {'Content-Type': 'image/x-icon'} );
    response.end();
    return;
  }
  response.writeHead(200, {'Content-Type': 'text/plain'});
  response.end(`チェックワンツー、ワンツー`);
}

http.createServer(check).listen(3100);
http.createServer(check).listen(80);
http.createServer(check).listen(443);