custom server backup_dir

Change-Id: I738260d4ea4c86b1ab114ae42d0030cba3b69871
diff --git a/README.rst b/README.rst
index f8834b6..3f60542 100644
--- a/README.rst
+++ b/README.rst
@@ -46,6 +46,7 @@
           hours_before_full: 24
           target:
             host: cfg01
+            backup_dir: server-home-dir
 
   .. note:: full_backups_to_keep param states how many backup will be stored locally on zookeeper client.
             More options to relocate local backups can be done using salt-formula-backupninja.