Improve documentation from #391

docs/docker.rst

@@ -20,6 +20,29 @@ Design your Dockerfile
 
 .. code-block:: docker
 
+jetson-stats need few things to be installed on your container.
+
+1. apt-get install -y python3
+2. ``apt-get install -y python3-pip`` or you can install from **source**
+
+Below a simple example to install jetson-stats
+
   FROM python:3-buster
   RUN pip install -U jetson-stats
 
+Tips and tricks
+---------------
+
+If you work with different **multiple users** on your docker container:
+
+.. code-block:: bash
+
+  docker run --group-add $JTOP_GID --rm -it -v /run/jtop.sock:/run/jtop.sock rbonghi/jetson_stats:latest
+
+You can get the ``JTOP_GID`` by running:
+
+.. code-block:: bash
+
+  getent group jtop | awk -F: '{print $3}'
+
+Issue reference `#391 https://github.com/rbonghi/jetson_stats/issues/391`_