README.md : information consistency
in the "How to test" section of the file, it is stated : 

> Check that ports **18080** (Monero p2p port) and 37889 (p2pool p2p port) are open in your firewall to ensure better connectivity

later in the code example :

> Run ./monerod --zmq-pub tcp://127.0.0.1:**18083** don't forget --zmq-pub parameter in the command line

I propose to align the port numbers on the same value.

Best regards,