Is there an online version of this? I see one of the "features" is that it's not cloud-based, but it is a web app... so can I self-host it, or would I be stuck

Is there an online version of this? I see one of the "features" is that it's not cloud-based, but it is a web app... so can I self-host it, or would I be stuck with Electron and sharing files on a thumb drive like a caveman?