Added new "dev" mailing list to this document
Added new "dev" mailing list to this document

Just completed the installation of Postfix, Dovecot, and GNU Mailman. Added the URL to subscribe to the mail list "dev@musicrecital.org in this document for visibility.
dlwhitehurst/MusicRecital,dlwhitehurst/MusicRecital,dlwhitehurst/MusicRecital