Versagte bei dem messenger-get-started@1.0.0 Startskript ‚Knoten app.js

Mein Server arbeitet auf lokale Ordnung, aber wenn ich Server nach dploying zu Amazon EC2 starten wirft es die folgenden Fehler: Diese Lösung knapp für mich reicht https://github.com/fbsamples/messenger-platform-samples/issues/43

node dist/app.js

Knoten dist / app.js

events.js:141
      throw er; // Unhandled 'error' event
      ^

Error: listen EADDRINUSE :::3979
    at Object.exports._errnoException (util.js:907:11)
    at exports._exceptionWithHostPort (util.js:930:20)
    at Server._listen2 (net.js:1250:14)
    at listen (net.js:1286:10)
    at Server.listen (net.js:1382:5)
    at EventEmitter.listen (/var/www/node_modules/express/lib/application.js:618:24)
    at Object.<anonymous> (/var/www/dist/app.js:120:6)
    at Module._compile (module.js:409:26)
    at Object.Module._extensions..js (module.js:416:10)
    at Module.load (module.js:343:32)

npm ERR! Linux 3.13.0-44-generic
npm ERR! argv /usr/bin/nodejs /usr/bin/npm start
npm ERR! node v4.8.0
npm ERR! npm  v2.15.11
npm ERR! code ELIFECYCLE
npm ERR! mychatapp@1.0.0 start: `node dist/app.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the mychatapp@1.0.0 start script 'node dist/app.js'.
npm ERR! This is most likely a problem with the mychatapp package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node dist/app.js
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs mychatapp
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!
npm ERR!     npm owner ls mychatapp
npm ERR! There is likely additional logging output above.

Nicht ahnend von process.env Laden, habe ich auch zu hart Code versucht, die folgenden Werte, sondern Ergebnis ist das gleiche.

const VALIDATION_TOKEN = '3f92bb17caf0e11f5632920a402e1687'

const PAGE_ACCESS_TOKEN = 'EAAN9j2KfDg0BAIUrb8ZCaPmgHQXyO88mR55X40gWSJ8gi0CagZC0bJ0wZCETTVFSIUHLC7Fr58O9q8JHrQYFtc1vT2ksjPxV2Z34dqZAUiZCfpyInRa24EyvZABvpK72nooh86TUCVlYn1F9njjIWlDVfvbNw481nZCvOOW0T5EOZAQZDZD'

const SERVER_URL = 'http://http://ec2-54-220-173-191.us-west-