Routing

app.get('/',homeServerResponse);
app.get('/hello/:firstname/:lastname',helloResponse);
function homeServerResponse(req,res) {
  const response = `Home`;
  res.send(response);
}
function helloResponse(req,res) {
  const firstname = req.params.firstname;
  const lastname = req.params.lastname;
  const response = `Hello ${firstname} ${lastname}`;
  res.send(response);
}