docs: update

README.rst

@@ -58,6 +58,13 @@ Installation
 ------------
 
 This setup uses `docker` and `docker-compose`.
+In addition we use x11 forwarding for gui support. Allow users to connect to you x11 client.
+
+.. code-block:: bash
+
+   xhost +
+
+Next set up the repo.
 
 .. code-block:: bash