im pretty sure its zero-installation. its a webapp. you go to a url, then thats it.
with WebRTC, the p2p connections is established between browsers. so i think it has a strong case for being p2p. You would be using your own device to run the javascript in the browser and storage provided by the browser is also from your device.
it will do all the encryption, data storage, etc on your browser using only the resources the browser will provide. I believe the functionality as a result is substancially independent selfhosted and p2p.
It’s on the todo list. Like I mentioned in the parent post, it’s far from finished.