Dash, migration from Heroku to Openshift

I was able to build a really simple app with my limited knowledge when it comes to web visualization thanks to Dash! I wrote the app for Heroku as it is well documented but I now need to migrate it to Openshift and well I have no clue how to do that. It doesn’t seem to work with the same structure than heroku.
I feel like Openshift is looking for some files that heroku didn’t need.

I read somewhere about needing a wsgi.py on Openshift but I have no idea what to put in there.
It is a long shot but if you can help that would be hugely appreciated.
App code is there :