text: const express = require('express')
      , app = express()
      , bodyParser = require('body-parser')
      , cors = require('cors');
  
  app.use(cors({ exposedHeaders: ['x-access-token']}));
  app.use(bodyParser.json());
  
  http.createServer(app).listen(3000, function() {
      console.log('Servidor escutando na porta: ' + this.address().port);
  });
  