server.js

// Dependencies.
const express = require("express");
const exphbs = require("express-handlebars");

// Create an instance of the express app.
const app = express();

// Setting the port of our application using Heroku.
const PORT = process.env.PORT || 8080;

// Serve static content for the app from the "public" directory in the application directory.
 app.use(express.static("public"));

// Parse request body as JSON.
app.use(express.urlencoded({ extended: true }));
app.use(express.json());

// Set Handlebars as view engine.
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);

app.listen(PORT, function() {
  console.log("App now listening at localhost:" + PORT);
});