text: var express = require("express");
  var app = express();
    
  app.use(express.static(__dirname+'/public'));
  
  app.get('/download', function(req, res){
    var filename = 'test.txt';
    res.attachment(filename);
    res.end('hello\\n,world\nke\nesun,hi', 'UTF-8'); //Actually, the data will be loaded form db.
  });
  
  var port = process.env.PORT;
  app.listen(port);
  