Duplicated tutorial notebooks

[Schaechtle]

All of the python notebooks seem to be duplicated in our image, see screenshot below.

[avinson]

These nbconvert files are not check into git but rather get generated when you run a notebook file. I'm not exactly sure if that's necessary or if we can disable somehow. Do you have any suggestions for a fix?

[avinson]

I'll look into it further but lmk if you have any ideas on how to fix. Thanks.