Convert docdock theme from submodule to native files and fix Hugo compatibility

themes/docdock/exampleSite/content/search/_index.md

@@ -0,0 +1,13 @@
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+title = "About the Search Engine"
+description = ""
+weight = 40
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+
+{{%excerpt-include filename="getting-start/configuration.md" /%}}
+
+
+Docdock theme uses the last improvement available in hugo version 20+ to generate a json index file ready to be consumed by lunr.js javascript search engine.
+
+
+{{%note%}}hugo generate lunrjs index.json at the root of `public` folder if the site only has one language or within each language subfolder. <br/>When you build the site with `hugo server`, hugo generates it internally and of course it don't show up in the filesystem{{%/note%}}