text: let port = process.env.PORT || 3000
  
  const server = {}
  
  server.start = (app) => {
    app.listen(port, () => {
      if (process.env.NODE_ENV === 'development') {
        console.log('------------------------------------------------------------')
        console.log('Express server listening on port ' + port)
        console.log('------------------------------------------------------------')
      }
    })
  }
  
  module.exports = server
  