Docker Server

Create a Droplet on Digital Ocean e.g. server

Log into the server

Install Tailscale https://login.tailscale.com/admin/machines/new-linux

tailscale set --ssh
# if 'server' is the name of your Droplet in Tailscale
ssh root@server

Set the Firewall for Tailscale:

Warning

Tailscale seems to work whatever I do in the Firewall!!