javascript - Node.js file server on Rpi3 Jesse -

i have file server works on rpi 2 raspian , have been trying migrate newer rpi3 jesse. every time try run following error stack

/media/pi/demoserver.js:82 server.listen(port, () => {                      ^ syntaxerror: unexpected token )     @ module._compile (module.js:439:25)     @ object.module._extensions..js (module.js:474:10)     @ module.load (module.js:356:32)     @ function.module._load (module.js:312:12)     @ function.module.runmain (module.js:497:10)     @ startup (node.js:119:16)     @ node.js:906:3  

any suggestions on why occurring? there subtle nuance between 2 distributions should address?

here code server (with omissions).

const express     = require('express');  const formidable  = require('formidable'); const fs          = require('fs-extra'); const http        = require('http'); const util        = require('util'); const serveindex  = require('serve-index'); const servestatic = require('serve-static'); const path        = require('path'); const server      = express(); const port        = process.env.port || 1001; const dirtoserve  = '/media/pi/shared';  function setheaders(res, filepath) {     res.setheader('content-disposition', 'attachment; filename=' + path.basename(filepath)); }  server.post('/media/pi/shared', function(req,res) { });  //serve static folder , index of folder server.use('/', serveindex(dirtoserve, { icond: true })); server.use('/', servestatic(dirtoserve, {setheaders: setheaders }));  server.listen(port, () => {     console.log('listening on port ' + port); });