ERROR : Please install Node.js and npm before continuing installation
->sudo apt-get update
->sudo apt-get install npm
->sudo apt-get install -y nodejs
->nodejs 버전이 오래됬다고 나오면
->curl -sL https://deb.nodesource.com/setup_14.x | sudo -E bash -
->sudo apt-get upgrade nodejs
->jupyter labextension install @jupyter-widgets/jupyterlab-manager