That's one of the things the .io domain hints at, along with the completely blank page when loading the website without JS enabled, the myriad of NPM dependencies and the fact that it is advertised as a lightweight tool while being a Vue SPA that loads 13 M of minified JS code (that's if you block google trackers), and google trackers.

I think you're correct. It's a webserver and they don't seem to release binaries