ddns-go

Moved two functions into a helper.go file, and did some refactoring. Also changed error type on a message into int instead of string. Nothing much to show, other than behavior staying the same.

I made the startup for a new node joining the network. Right now it’s lacking a lot of important features, and overall not really that good, missing things like actually verifying domains and such but it’s a start. Also, I made a seed server which is essential when starting up, but it is lacking features and uses hard-coded ips since I was testing. I also made a test/ folder which just contains code emulating an actual node in the network and also uses hard-coded values.