This is a lightweight NodeJS collaborative Whiteboard/Sketchboard which can easily be customized...
Integrates with WebDAV/ Nextcloud too.
I use Cloudron with Gandi & Hetzner
@jdaviescoates Very cool find mate!
For cutting edge web technologies
@micmc found it via Hetzner as it's one of the apps they install if you install their "collaboration tools" app, see: