[doc] update documentation of the installation procedures

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

docs/admin/installation-searxng.rst

@@ -9,15 +9,16 @@ Step by step installation
    :local:
    :backlinks: entry
 
-Step by step installation with virtualenv.  For Ubuntu, be sure to have enable
-universe repository.
+
+In this section we show the setup of a SearXNG instance that will be installed
+by the :ref:`installation scripts`.
 
 .. _install packages:
 
 Install packages
 ================
 
-.. kernel-include:: $DOCS_BUILD/includes/searx.rst
+.. kernel-include:: $DOCS_BUILD/includes/searxng.rst
    :start-after: START distro-packages
    :end-before: END distro-packages
 
@@ -30,24 +31,24 @@ Install packages
 Create user
 ===========
 
-.. kernel-include:: $DOCS_BUILD/includes/searx.rst
+.. kernel-include:: $DOCS_BUILD/includes/searxng.rst
    :start-after: START create user
    :end-before: END create user
 
-.. _searx-src:
+.. _searxng-src:
 
 Install SearXNG & dependencies
 ==============================
 
-Start a interactive shell from new created user and clone searx:
+Start a interactive shell from new created user and clone SearXNG:
 
-.. kernel-include:: $DOCS_BUILD/includes/searx.rst
+.. kernel-include:: $DOCS_BUILD/includes/searxng.rst
    :start-after: START clone searxng
    :end-before: END clone searxng
 
 In the same shell create *virtualenv*:
 
-.. kernel-include:: $DOCS_BUILD/includes/searx.rst
+.. kernel-include:: $DOCS_BUILD/includes/searxng.rst
    :start-after: START create virtualenv
    :end-before: END create virtualenv
 
@@ -55,7 +56,7 @@ To install searx's dependencies, exit the SearXNG *bash* session you opened abov
 and restart a new.  Before install, first check if your *virtualenv* was sourced
 from the login (*~/.profile*):
 
-.. kernel-include:: $DOCS_BUILD/includes/searx.rst
+.. kernel-include:: $DOCS_BUILD/includes/searxng.rst
    :start-after: START manage.sh update_packages
    :end-before: END manage.sh update_packages
 
@@ -77,30 +78,41 @@ Configuration
    - :ref:`settings use_default_settings`
    - :origin:`/etc/searxng/settings.yml <utils/templates/etc/searxng/settings.yml>`
 
-To create a initial ``/etc/searxng/settings.yml`` you can start with a copy of
-the file :origin:`utils/templates/etc/searxng/settings.yml`.  This setup
+To create a initial ``/etc/searxng/settings.yml`` we recommend to start with a
+copy of the file :origin:`utils/templates/etc/searxng/settings.yml`.  This setup
 :ref:`use default settings <settings use_default_settings>` from
-:origin:`searx/settings.yml`.
+:origin:`searx/settings.yml` and is shown in the tab *"Use default settings"*
+below. This setup:
 
-For a *minimal setup*, configure like shown below – replace ``searx@$(uname
--n)`` with a name of your choice, set ``ultrasecretkey`` -- *and/or* edit
-``/etc/searxng/settings.yml`` to your needs.
+- enables :ref:`limiter <limiter>` to protect against bots
+- enables :ref:`image proxy <image_proxy>` for better privacy
+- enables :ref:`cache busting <static_use_hash>` to save bandwith
 
-.. kernel-include:: $DOCS_BUILD/includes/searx.rst
-   :start-after: START searxng config
-   :end-before: END searxng config
+Modify the ``/etc/searxng/settings.yml`` to your needs:
 
 .. tabs::
 
   .. group-tab:: Use default settings
 
-    .. literalinclude:: ../../utils/templates/etc/searxng/settings.yml
-       :language: yaml
+     .. literalinclude:: ../../utils/templates/etc/searxng/settings.yml
+        :language: yaml
+        :end-before: # hostname_replace:
+
+     To see the entire file jump to :origin:`utils/templates/etc/searxng/settings.yml`
 
   .. group-tab:: searx/settings.yml
 
-    .. literalinclude:: ../../searx/settings.yml
-       :language: yaml
+     .. literalinclude:: ../../searx/settings.yml
+        :language: yaml
+        :end-before: # hostname_replace:
+
+     To see the entire file jump to :origin:`searx/settings.yml`
+
+For a *minimal setup* you need to set ``server:secret_key``.
+
+.. kernel-include:: $DOCS_BUILD/includes/searxng.rst
+   :start-after: START searxng config
+   :end-before: END searxng config
 
 
 Check
@@ -110,7 +122,7 @@ To check your SearXNG setup, optional enable debugging and start the *webapp*.
 SearXNG looks at the exported environment ``$SEARXNG_SETTINGS_PATH`` for a
 configuration file.
 
-.. kernel-include:: $DOCS_BUILD/includes/searx.rst
+.. kernel-include:: $DOCS_BUILD/includes/searxng.rst
    :start-after: START check searxng installation
    :end-before: END check searxng installation