def start
      Signal.trap(:INT) do
        coordinator.running = false
      end

      Signal.trap(:TERM) do
        exit
      end

      coordinator.run
    end
def start
      Signal.trap(:INT) do
        coordinator.running = false
      end

      Signal.trap(:TERM) do
        exit
      end

      coordinator.run
    end
Initialize a new CLI instance to handle option parsing from arguments
   into configuration to start the coordinator running on all mailboxes

 @param args [Array] `ARGV` passed from `bin/mail_room`
 Start the coordinator running, sets up signal traps