feat(docs): instructions on using nvme-spex with docker

Adds instructions to the sphinx documentation, that describes how
it is possible to use nvme-spex directly through docker. Without
starting the webserver.

Signed-off-by: Morten B. Rasmussen <m.rasmussen@samsung.com>

docs/source/index.rst

@@ -20,15 +20,24 @@ on data-structures in the NVMe specification documents.
 To read more about what **Spex** does, see :ref:`sec-what-is-spex`.
 For help on setting up **Spex** on your system, see :ref:`sec-setup`.
 
-For direct usage of nvme-spex as a linting tool it is possible to run it from
-docker. For setup of docker on windows we refer to guides from `Docker Desktop
-<https://docs.docker.com/desktop/install/windows-install/>`_ or `Podman
-<https://podman.io/docs/installation>`_
+
+For direct usage of nvme-spex it is possible to run it from docker. For setup of
+docker on windows we refer to guides from `Docker Desktop
+<https://docs.docker.com/desktop/install/windows-install/>`_.
+
+.. code-block:: shell
+
+      docker run --rm -v ~/Documents/specs/:/specs ghcr.io/samsungds/nvme-spex-webserver:latest run -s --output=/specs/output /specs/nvme_base.docx 
+
+The output of the run will be available at ~/Documents/specs/output in this example.
+
+It is also possible to lint the docx specification by using the web application.
+To start the web application can be started with the following command:
 
 .. code-block:: shell
 
        docker pull ghcr.io/samsungds/nvme-spex-webserver:latest
-       docker run -p 8000:8000 ghcr.io/samsungds/nvme-spex-webserver:latest
+       docker run --rm -p 8000:8000 ghcr.io/samsungds/nvme-spex-webserver:latest webserver
 
 When the docker container is successfully running the web application can be
 accessed in the browser at `http://localhost:8000 <http://localhost:8000>`_.