If you'd like to see FreeDNS support in VyOS you might want to open a feature request.
Feb 10 2018
Feb 9 2018
Feb 8 2018
The new article is under https://wiki.vyos.net/wiki/VyOS_on_Packet.net
I added it to the 'Other' section of the user documentation since 'VyOS on GNS3' is already there.
Feb 7 2018
Feb 6 2018
I'm rummaging around in the wiki just now, i could quickly update the page but i'm unsure about the details;
Sep 19 2017
Here's the article: https://wiki.vyos.net/wiki/VyOS_on_GNS3