old_contents: 
  var express = require('express');
  var mongoose = require('mongoose');
  
  var app = express();
  
  // mongoose.connect('mongodb://localhost/sentimental01'); // connect to mongo database named shortly
  
  // // configure our server with all the middleware and and routing
  require('./config/middleware.js')(app, express);
  
  // export our app, required by server.js
  module.exports.app = app;
new_contents: 
  var express = require('express');
  
  var app = express();
  
  // // configure our server with all the middleware and and routing
  require('./config/middleware.js')(app, express);
  
  // export our app, required by server.js
  module.exports.app = app;
subject: Remove references to mongoDB as we pivot to mySQL