Update README

README.md

@@ -35,7 +35,8 @@ Example Playbook
       roles:
          - { role: hedgedocs-pad-lqdn,
              hedgedoc-version: "1.7.0-rc2",
-             hedgedoc-sql-password : "default password ITtHlXfTEBwcCypWPX07"
+             hedgedoc-sql-password : "default password ITtHlXfTEBwcCypWPX07",
+             service_hedgedocs_domain : "https://pad.test.lqdn.fr"
          }
 
 License