Add link to wiki

Author: lord

README.md

@@ -62,6 +62,8 @@ You can now see the docs at http://localhost:4567. Whoa! That was fast!
 
 Now that Slate is all set up your machine, you'll probably want to learn more about [editing Slate markdown](https://github.com/tripit/slate/wiki/Markdown-Syntax), or [how to publish your docs](https://github.com/tripit/slate/wiki/Deploying-Slate).
 
+If you'd prefer to use Docker, instructions are available [in the wiki](https://github.com/tripit/slate/wiki/Docker).
+
 Companies Using Slate
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