parametrize server side backup dir

PROD-18191

Change-Id: Idf9167db6a96af48acb3a65b499bbba9b1c511a5
diff --git a/README.rst b/README.rst
index 312ad4d..3bbcf44 100644
--- a/README.rst
+++ b/README.rst
@@ -40,6 +40,7 @@
         target:
           engine: rsync
           engine_opts: "-av --delete --recursive --safe-links"
+          home_dir: /srv/volumes/backup/backupninja
           host: 10.10.10.208
           user: backupninja