text: var express = require('express');
  var path = require('path');
  var favicon = require('serve-favicon');
  var logger = require('morgan');
  var bodyParser = require('body-parser');
  
  var book = require('./routes/book');
  var auth = require('./routes/auth');
  var app = express();
  
  var mongoose = require('mongoose');
  mongoose.Promise = require('bluebird');
  mongoose.connect('mongodb://localhost/mern-secure', { promiseLibrary: require('bluebird') })
    .then(() =>  console.log('connection successful'))
    .catch((err) => console.error(err));
  
  app.use(logger('dev'));
  app.use(bodyParser.json());
  app.use(bodyParser.urlencoded({'extended':'false'}));
  app.use(express.static(path.join(__dirname, 'build')));
  
  app.use('/api/book', book);
  app.use('/api/auth', auth);
  
  // catch 404 and forward to error handler
  app.use(function(req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    next(err);
  });
  
  // error handler
  app.use(function(err, req, res, next) {
    // set locals, only providing error in development
    res.locals.message = err.message;
    res.locals.error = req.app.get('env') === 'development' ? err : {};
  
    // render the error page
    res.status(err.status || 500);
    res.render('error');
  });
  
  module.exports = app;
  