Welcome to Yggdrasil forum!
docker run -p [ipv6]:80:80 ... so the container will expose port 80 for specific ipv6 address, you can use as many as you want. To avoid port conflict, ensure that there is no application on port 80 of host machinedig @324:71e:281a:9ed3::53 website.yggreturns a record SOA ns.alfis.name. ... meaning it serves .ygg domains