Install git-lfs first.
Config files are updated by the workflow scripts in the workflows folder. The file workflows/cord19_collect.py collects the CORD19 dataset and creates/updates the metadata file config/all.json. The same holds for the file workflows/covid19-preprints.py for the preprints dataset.
python workflows/cord19_collect.py
python workflows/covid19_preprints_collect.py
Automated updates are scheduled in the .github/workflows/covid19.yml file.