gdns sets up router7 dyndns entries for transparent proxies to make gokrazy processes available under a name instead of a port number.
In other words, when installing the github.com/gokrazy/timestamps package on
your gokrazy instance, you will be able to access it at
http://timestamps.gokrazy/ in your browser.
First, configure the fdf5:3606:2a21::/64 IPv6 network which gdns uses:
router7# mkdir /perm/radvd
router7# echo '[{"IP":"fdf5:3606:2a21::","Mask":"//////////8AAAAAAAAAAA=="}]' > /perm/radvd/prefixes.json
router7# killall radvd
Then, add gdns to your gokrazy instance:
% gok add github.com/gokrazy/gdns
% gok update
% sleep 20
% curl http://timestamps.gokrazy/metrics