Explain setting juju-dashboard-url to any URL

Signed-off-by: Babak K. Shandiz <[email protected]>

tutorial/deploy_jimm_microk8s.rst

@@ -244,6 +244,12 @@ Optionally, if you have deployed Juju Dashboard, you can configure JIMM to enabl
 
     juju config jimm juju-dashboard-location="<juju-dashboard-url>"
 
+.. note::
+    However, in absence of a Juju Dashboard, you can still enable OAuth browser authentication flow by setting this parameter to any valid URL. For example:
+
+    .. code:: bash
+
+        juju config jimm juju-dashboard-location="http://test-jimm.localhost/auth/whoami"
 
 Note that the public and private key pairs must be generated by the `go macaroon bakery repository <https://github.com/go-macaroon-bakery/macaroon-bakery>`__.
 To do this briefly run the following command, ensuring you have the ``go`` tool installed: