Fix bug.

lib/tasks/change_site_server_name.rake

@@ -16,6 +16,7 @@ namespace :create_site do
           exec_command_by_user(ssh,cmd)
           exec_ssh_command_by_sudo(ssh,"service nginx restart")
         end
+        site_construct.update(:domain_name=>args.server_name)
       end
     rescue => e
       puts [e,e.backtrace]