old_contents: //first we import our dependencies…
  var express = require('express');
  var path = require('path');
  var react = require('react');
  var ReactDOMServer = require('react-dom/server');
  var render = require('./render');
  var mongoose = require('mongoose');
  var cors = require('cors');
  var bodyParser = require('body-parser');
  var Appointment = require('./model/appointments');
  
  //and create our instances
  var app = express();
  var router = express.Router();
  
  app.use(express.static(path.resolve(__dirname, '../react-ui/build/static')));
  //set our port to either a predetermined port number if you have set 
  //it up, or 3899
  var port = process.env.PORT || 3899;
  //db config
  mongoose.connect('mongodb://josh11:josh11@ds133162.mlab.com:33162/heroku_tl016m5d');
  app.use(cors());
  //now we should configure the API to use bodyParser and look for 
  //JSON data in the request body
  app.use(bodyParser.urlencoded({ extended: true }));
  app.use(bodyParser.json());
  
  //now we can set the route path & initialize the API
  router.get('/api', function(req, res) {
    res.send('Hello World!');
  });
  // All remaining requests return the React app, so it can handle routing.
  app.get('*', function(request, response) {
    response.sendFile(path.resolve(__dirname, '../react-ui/build/', 'index.html'));
  });
  //Use our router configuration when we call /api
  app.use('/', router);
  //starts the server and listens for requests
  app.listen(port, function() {
   console.log('api running on port' + port);
  });
  //adding the /appointments route to our /api router
  router.route('/api/appointments')
   //retrieve all appointments from the database
   .get(function(req, res) {
   //looks at our Appointment Schema
   Appointment.find(function(err, appointments) {
   if (err)
   res.send(err);
   //responds with a json object of our database appointments.
   res.json(appointments)
   });
   })
   //post new appointment to the database
   .post(function(req, res) {
    var appointment = new Appointment();
    //body parser lets us use the req.body
    appointment.appointmentTitle = req.body.appointmentTitle;
    appointment.appointmentDate = req.body.appointmentDate;
    appointment.appointmentTime = req.body.appointmentTime;
    appointment.appointmentDescription = req.body.appointmentDescription;
    appointment.appointmentDestination = req.body.appointmentDestination;
    appointment.appointmentOrigin = req.body.appointmentOrigin;
    appointment.travelMode = req.body.travelMode;
    appointment.save(function(err) {
    if (err) 
      res.send(err);
      res.json({ message: 'Appointment successfully added!' });
    });
   });
  //Use our router configuration when we call /api
  //...
  
new_contents: //first we import our dependencies…
  var express = require('express');
  var path = require('path');
  var react = require('react');
  var ReactDOMServer = require('react-dom/server');
  var render = require('./render');
  var mongoose = require('mongoose');
  var cors = require('cors');
  var bodyParser = require('body-parser');
  var Appointment = require('./model/appointments');
  
  //and create our instances
  var app = express();
  var router = express.Router();
  
  app.use(express.static(path.resolve(__dirname, '../react-ui/build/')));
  //set our port to either a predetermined port number if you have set 
  //it up, or 3899
  var port = process.env.PORT || 3899;
  //db config
  mongoose.connect('mongodb://josh11:josh11@ds133162.mlab.com:33162/heroku_tl016m5d');
  app.use(cors());
  //now we should configure the API to use bodyParser and look for 
  //JSON data in the request body
  app.use(bodyParser.urlencoded({ extended: true }));
  app.use(bodyParser.json());
  
  //now we can set the route path & initialize the API
  router.get('/api', function(req, res) {
    res.send('Hello World!');
  });
  // All remaining requests return the React app, so it can handle routing.
  app.get('*', function(request, response) {
    response.sendFile(path.resolve(__dirname, '../react-ui/build/', 'index.html'));
  });
  //Use our router configuration when we call /api
  app.use('/', router);
  //starts the server and listens for requests
  app.listen(port, function() {
   console.log('api running on port' + port);
  });
  //adding the /appointments route to our /api router
  router.route('/api/appointments')
   //retrieve all appointments from the database
   .get(function(req, res) {
   //looks at our Appointment Schema
   Appointment.find(function(err, appointments) {
   if (err)
   res.send(err);
   //responds with a json object of our database appointments.
   res.json(appointments)
   });
   })
   //post new appointment to the database
   .post(function(req, res) {
    var appointment = new Appointment();
    //body parser lets us use the req.body
    appointment.appointmentTitle = req.body.appointmentTitle;
    appointment.appointmentDate = req.body.appointmentDate;
    appointment.appointmentTime = req.body.appointmentTime;
    appointment.appointmentDescription = req.body.appointmentDescription;
    appointment.appointmentDestination = req.body.appointmentDestination;
    appointment.appointmentOrigin = req.body.appointmentOrigin;
    appointment.travelMode = req.body.travelMode;
    appointment.save(function(err) {
    if (err) 
      res.send(err);
      res.json({ message: 'Appointment successfully added!' });
    });
   });
  //Use our router configuration when we call /api
  //...
  
subject: remove static fro express.static path