Define a Hostname using mDNS

[BrunoRCast]

Hi... Congratulations to everyone involved, fantastic project! I believe that implementing hostname using mDNS would be a very important step since we generally use DHCP, I am organizing myself to make attempts, unfortunately in the company I work at the firewall was changed and platformIO is being blocked, if you could contribute to this solution, I believe it would be of interest to many, thank you in advance!