Essentially modifications to ensure I'm able to run the notebooks properly.
Basically:
Anaconda environment had to be modified, with a specification of strict gcc version to support C++ 14 and C++17 standards.
Jupyter extensions are unfortunately no longer supported (and my quick attempts to use nbclassic didn't work as expected for them). So I have switched back to JupyterLab (but we can no longer update the table of contents automatically )
Apparently now we need to give a token to run a notebook; the commands have been updated and the README updated as well.
I have changed the name of conda environment and username in Docker images to make them shorter.
