node.js - Deploying Aurelia app to Heroku Cannot GET /app/ -

i trying deploy , run aurelia app on heroku

i forked using aurelia nodejs express app , followed bouncing ball in documentation getting started node.js

which

heroku create  git push heroku master 

after futzing around worked out on heroku needed development dependencies dependencies section of package.json.

anyway, compiles , deploys now.

the problem think heroku intercepting aurelia navigation when try , navigate https://the-app-1234.herokuapp.com/app/ reports

cannot /app/

how behave properly?

edit:

i'm pretty sure not related node.js because application works fine in localhost. heroku.