searx: added searx setup and firefox integration

wiki/searx.md

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+# Searx
+
+[Searx](https://searx.me) is a free metasearch engine.
+
+## Setup
+
+### Docker
+
+The official container and documentation was made by [searx](https://hub.docker.com/r/searx/searx).
+
+#### Volumes
+
+Set the following volumes with the -v tag.
+
+| Volume-Name | Container mount  | Description      |
+| ----------- | ---------------- | ---------------- |
+| `searx_etc` | `/etc/searx`     | storage for etc  |
+| `searx_log` | `/var/log/uwsgi` | storage for logs |
+
+#### Ports
+
+Set the following ports with the -p tag.
+
+| Container Port | Recommended outside port | Protocol | Description |
+| -------------- | ------------------------ | -------- | ----------- |
+| `8080`         | `8080`                   | TCP      | WebUI       |
+
+#### Rebuild
+
+```shell
+#!/bin/sh
+docker stop searx
+docker rm searx
+docker pull searx/searx
+docker run --name searx \
+    --restart unless-stopped \
+    -v searx_etc:/etc/searx \
+    -v searx_log:/var/log/uwsgi \
+    -p 8080:8080 \
+    -d searx/searx
+```
+
+## Adding to Firefox
+
+You can add Searx as your standard search engine with the addon `Add custom search engine`.
+Follow the instructions by the addon and put searx with
+`<url to searx instance>/search?q=%s` as search string.
+Make sure to replace `<url to searx instance>` with the url of your instance.
+
+It is possible to add it without an addon.
+Navigate to the searx instance and click the `...` in the address bar.
+Then click `Add Search Engine`