Run diva node Documentation: Do not prompt user to expose unnecessary ports

[markoinether]

referring to tutorial here:
https://docs.shamirlabs.org/diva/testnet/install/manual/configure

Exposing ports 30000 and 80 is not necessary for the functioning of the protocol. Although may not pose a problem, it seems more prudent to navigate people not to open these ports and rather forword them. They are either running them locally in which case it is not a problem or on a remote server in which case they can tunnel the ports via SSH just like so:

 ssh user@server -L 80:127.0.0.1:80-L 30000:127.0.0.1:30000 # My diva server with port forwarding

I would suggest this to be the default.