server.js

var express = require("express");
var mongoose = require("mongoose");

var PORT = process.env.PORT || 3000;

var app = express();

// Parse request body as JSON
app.use(express.urlencoded({ extended: true }));
app.use(express.json());
// Make public a static folder
app.use(express.static("public"));

// Connect to MongoDB
var MONGODB_URI = process.env.MONGODB_URI || "mongodb://localhost/mozscraper";

mongoose.connect(MONGODB_URI, { useNewUrlParser: true });
mongoose.set("useCreateIndex", true);

// 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/routes.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);
});