docker-images: added mikenye/picard and related articles and updated links in old ones

wiki/search_engine.md

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+# Search Engine
+
+A search engine is a software that searches and finds web pages given a search
+term.
+Search engines are usually set as the start page of a
+[web browser](/wiki/web_browser.md).
+
+## Engine Providers
+
+There are various search engines that can be used.
+
+- [Google](https://www.google.com/) is the most used search engine in the world.
+  Despite that being the case it has questionable privacy standards.
+- [DuckDuckGo](https://duckduckgo.com/) is a privacy oriented search engine.
+  For that reason it does not feature personalized search results.
+- [Whoogle](/wiki/whoogle.md) is a free metasearch engine that can be
+  self-hosted.
+  It uses the general layout of the Google search engine.
+- [Searx](/wiki/searx.md) is a free metasearch engine that can be self-hosted.