App deployment: reference pictures and files

Dear community,
I want to deploy my app and I’m having trouble referencing files. My .py file is this one:

It contains references to two items that are in the same repository where the app file is:

I have tried several ways to make it work but no luck so far…what is the correct code to reference these items? Working with the app on my local instance I had no trouble.

Many thanks,

Marta