You don't need to run npm to install any dependencies.
There are none.
Just run:
node transform_data.js
… to create the input JSON from the CSV files in the dataset folder.
and then run
node process-data.js
to create the chart.csv file, on which the chart is based upon.
get-data.js is an orphaned tool that I wanted to use to fetch the data. I keep it here for documentation.