If you don’t trust Tailscale OR THE VPS YOU ARE ROOT ON YOURSELF, you should maybe not host anything.
Also: you probably haven’t understood how Tailscale works: it only mediates the connection but the provider servers are not in between two participants in your network (except relay). Those are direct connections.
As a big fan of UK, I am looking forward to try out Dockge! Thank you so much for your work and dedication to the selfhosted community.