docs: revision of the installation instructions

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

docs/admin/installation-nginx.rst

@@ -0,0 +1,141 @@
+.. _installation nginx:
+
+==================
+Install with nginx
+==================
+
+.. sidebar:: public HTTP servers
+
+   On public searx instances use an application firewall (:ref:`filtron
+   <filtron.sh>`).
+
+.. contents:: Contents
+   :depth: 2
+   :local:
+   :backlinks: entry
+
+If nginx is not installed (uwsgi will not work with the package
+nginx-light):
+
+.. tabs::
+
+   .. group-tab:: Ubuntu / debian
+
+      .. code:: sh
+
+         sudo -H apt-get install nginx
+
+Hosted at ``/``
+===============
+
+Create the configuration file ``/etc/nginx/sites-available/searx`` with this
+content:
+
+.. code:: nginx
+
+    server {
+        listen 80;
+        server_name searx.example.com;
+        root /usr/local/searx/searx;
+
+        location /static {
+        }
+
+        location / {
+                include uwsgi_params;
+                uwsgi_pass unix:/run/uwsgi/app/searx/socket;
+        }
+    }
+
+Create a symlink to sites-enabled:
+
+.. code:: sh
+
+   sudo -H ln -s /etc/nginx/sites-available/searx /etc/nginx/sites-enabled/searx
+
+Restart service:
+
+.. tabs::
+
+   .. group-tab:: Ubuntu / debian
+
+      .. code:: sh
+
+         sudo -H systemctl restart nginx
+         sudo -H systemctl restart uwsgi
+
+from subdirectory URL (``/searx``)
+==================================
+
+Add this configuration in the server config file
+``/etc/nginx/sites-enabled/default``:
+
+.. code:: nginx
+
+    location /searx/static {
+            alias /usr/local/searx/searx/static;
+    }
+
+    location /searx {
+            uwsgi_param SCRIPT_NAME /searx;
+            include uwsgi_params;
+            uwsgi_pass unix:/run/uwsgi/app/searx/socket;
+    }
+
+
+**OR** using reverse proxy (Please, note that reverse proxy advised to be used
+in case of single-user or low-traffic instances.)
+
+.. code:: nginx
+
+    location /searx/static {
+            alias /usr/local/searx/searx/static;
+    }
+
+    location /searx {
+        proxy_pass http://127.0.0.1:8888;
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Scheme $scheme;
+        proxy_set_header X-Script-Name /searx;
+        proxy_buffering off;
+    }
+
+Enable ``base_url`` in ``searx/settings.yml``
+
+.. code:: yaml
+
+    base_url : http://your.domain.tld/searx/
+
+Restart service:
+
+.. tabs::
+
+   .. group-tab:: Ubuntu / debian
+
+      .. code:: sh
+
+         sudo -H systemctl restart nginx
+         sudo -H systemctl restart uwsgi
+
+
+disable logs
+============
+
+For better privacy you can disable nginx logs about searx.  How to proceed:
+below ``uwsgi_pass`` in ``/etc/nginx/sites-available/default`` add:
+
+.. code:: nginx
+
+    access_log /dev/null;
+    error_log /dev/null;
+
+Restart service:
+
+.. tabs::
+
+   .. group-tab:: Ubuntu / debian
+
+      .. code:: sh
+
+         sudo -H systemctl restart nginx