Enable debugger for jupyter notebook

[ggruszczynski]

$ jupyter labextension install @jupyterlab/debugger
An error occurred.
ValueError: Please install nodejs >=12.0.0 before continuing. nodejs may be installed using conda or directly from the nodejs website.
See the log file for details:  /tmp/jupyterlab-debug-gm2vfame.log

FIX:
https://computingforgeeks.com/how-to-install-nodejs-on-ubuntu-debian-linux-mint/
curl -sL https://deb.nodesource.com/setup_12.x | sudo -E bash -

apt-get install -y nodejs

jupyter labextension install @jupyterlab/debugger

install kernel which supports debugging (the standard one shall support too, but it doesnt)

pip3 install xeus-python