text: var express = require("express");
  var bodyParser = require("body-parser");
  
  var port = 3000;
  
  var app = express();
  
  // Serve static content for the app from the "public" directory in the application directory.
  app.use(express.static(__dirname + "/public"));
  
  app.use(bodyParser.urlencoded({ extended: false }));
  
  // Set Handlebars.
  var exphbs = require("express-handlebars");
  
  app.engine("handlebars", exphbs({ defaultLayout: "main" }));
  app.set("view engine", "handlebars");
  
  // Import routes and give the server access to them.
  var routes = require("./controllers/burger_controller.js");
  
  app.use("/", routes);
  
  app.listen(port);
  