[doc] update documentation of the installation procedures

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

docs/admin/architecture.rst

@@ -8,17 +8,19 @@ Architecture
 
    - Reverse Proxy: :ref:`Apache <apache searxng site>` & :ref:`nginx <nginx
      searxng site>`
-   - Filtron: :ref:`searxng filtron`
-   - Morty: :ref:`searxng morty`
    - uWSGI: :ref:`searxng uwsgi`
    - SearXNG: :ref:`installation basic`
 
 Herein you will find some hints and suggestions about typical architectures of
 SearXNG infrastructures.
 
-We start with a contribution from :pull-searx:`@dalf <1776#issuecomment-567917320>`.
-It shows a *reference* setup for public SearXNG instances which can build up and
-maintained by the scripts from our :ref:`toolboxing`.
+.. _architecture uWSGI:
+
+uWSGI Setup
+===========
+
+We start with a *reference* setup for public SearXNG instances which can build
+up and maintained by the scripts from our :ref:`toolboxing`.
 
 .. _arch public:
 
@@ -26,3 +28,11 @@ maintained by the scripts from our :ref:`toolboxing`.
    :alt: arch_public.dot
 
    Reference architecture of a public SearXNG setup.
+
+The reference installation activates ``server.limiter``, ``server.image_proxy``
+and ``ui.static_use_hash`` (:origin:`/etc/searxng/settings.yml
+<utils/templates/etc/searxng/settings.yml>`)
+
+.. literalinclude:: ../../utils/templates/etc/searxng/settings.yml
+   :language: yaml
+   :end-before: # preferences: