[doc] update documentation of the installation procedures

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

docs/admin/installation-scripts.rst

@@ -0,0 +1,62 @@
+.. _installation scripts:
+
+===================
+Installation Script
+===================
+
+.. sidebar:: Update OS first!
+
+   To avoid unwanted side effects, update your OS before installing SearXNG.
+
+The following will install a setup as shown in :ref:`the reference architecture
+<arch public>`.  First you need to get a clone.  The clone is only needed for
+the installation procedure and some maintenance tasks.
+
+.. sidebar:: further read
+
+   - :ref:`toolboxing`
+
+Jump to a folder that is readable by *others* and start to clone SearXNG,
+alternatively you can create your own fork and clone from there.
+
+.. code:: bash
+
+   $ cd ~/Downloads
+   $ git clone https://github.com/searxng/searxng.git searxng
+   $ cd searxng
+
+.. sidebar:: further read
+
+   - :ref:`inspect searxng`
+
+To install a SearXNG :ref:`reference setup <use_default_settings.yml>`
+including a :ref:`uWSGI setup <architecture uWSGI>` as described in the
+:ref:`installation basic` and in the :ref:`searxng uwsgi` section type:
+
+.. code:: bash
+
+   $ sudo -H ./utils/searxng.sh install all
+
+.. attention::
+
+   For the installation procedure, use a *sudoer* login to run the scripts.  If
+   you install from ``root``, take into account that the scripts are creating a
+   ``searxng`` user.  In the installation procedure this new created user do
+   need read access to the clone of searx, which is not the case if you clone
+   into a folder below ``/root``!
+
+.. sidebar:: further read
+
+   - :ref:`update searxng`
+
+.. _caddy: https://hub.docker.com/_/caddy
+
+When all services are installed and running fine, you can add SearXNG to your
+HTTP server.  We do not have any preferences for the HTTP server, you can use
+whatever you prefer.
+
+We use caddy in our :ref:`docker image <installation docker>` and we have
+implemented installation procedures for:
+
+- :ref:`installation nginx`
+- :ref:`installation apache`