text: 
  const express = require('express');
  //route files
  const bootcamps = require('/routes/bootcamps');
  
  const dotenv = require('dotenv');
  
  dotenv.config({ path: './config/config.env' });
  
  const app = express();
  
  const PORT = process.env.PORT || 5000;
  app.listen(
      PORT,
      console.log(`Server running in ${process.env.NODE_ENV} mode on port ${PORT}`));