text: const express = require("express");
  
  const PORT = process.env.PORT || 8080;
  
  const app = express();
  
  // Serve static content for the app from the "public" directory in the application directory.
  app.use(express.static("public"));
  
  // Parse application body as JSON
  app.use(express.urlencoded({ extended: true }));
  app.use(express.json());
  
  // Set Handlebars
  const exphbs = require("express-handlebars");
  
  app.engine("handlebars", exphbs({ defaultLayout: "main" }));
  app.set("view engine", "handlebars");
  
  // Import routes and give the server access to them
  const routes = require("./controllers/burgers_controller.js");
  
  app.use(routes);
  
  // Start our server so that it can begin listening to client requests
  app.listen(PORT, function () {
    // Log (server-side) when our server has started
    console.log("Server listening on: http://localhost:" + PORT);
  });
  