app.js

var express = require("express")
var app = express()

app.get("/", function( req, res ){
  res.send("Hello world! <a href='/jesse'>Say Hi to Jesse</a>")
})

app.get("/:name", function( req, res ){
  res.send("Hello "+ req.params.name +"!")
})

app.listen(3000, function(){
  console.log("app listening at http://localhost:3000/")
})