server.js

// Require our dependecies
var express = require("express");
var mongoose = require("mongoose");
var bluebird = require("bluebird");
var bodyParser = require("body-parser");
var routes = require("./routes/routes");

// Set up a default port, configure mongoose, configure our middleware
var PORT = process.env.PORT || 3000;
mongoose.Promise = bluebird;
var app = express();
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
app.use(express.static(__dirname + "/public"));
app.use("/", routes);

var db = "mongodb://heroku_9chsvb1w:am9kbli27rff74c5hv558na4vj@ds127842.mlab.com:27842/heroku_9chsvb1w" || "mongodb://localhost/quotesApp";

// Connect mongoose to our database
mongoose.connect(db, function(error) {
  // Log any errors connecting with mongoose
  if (error) {
    console.error(error);
  }
  // Or log a success message
  else {
    console.log("mongoose connection is successful");
  }
});

// Start the server
app.listen(PORT, function() {
  console.log("Now listening on port %s! Visit localhost:%s in your browser.", PORT, PORT);
});