Update cluster configuration in README documentation.
Update cluster configuration in README documentation.

arnonmoscona/copycat,kuujo/copycat,aruanruan/copycat,tempbottle/copycat,tempbottle/copycat,madjam/copycat,madjam/copycat,arnonmoscona/copycat,atomix/atomix,atomix/atomix,kuujo/copycat,aruanruan/copycat