For macOS to stop showing the puppeteer firewall popup:

Follow instructions at artginzburg/puppeteer-chromium-macOS-Firewall-popup-stop.md

To send a file for test

cd testSigs/valid
curl -vF toCheck=@test.sig http://localhost:6969/check

To send multiple files for test

cd testSigs/valid
curl -vF toCheck=@forTwo.sig -F toCheck=@forTwo.pdf http://localhost:6969/check