Add a link to the documentation in the README.md file

README.md

@@ -2,6 +2,10 @@
 
 An easy to use Python 3 high level API client, to build ML tasks.
 
+## Documentation
+
+The [documentation](https://workers.arkindex.org/) is made with [Material for MkDocs](https://github.com/squidfunk/mkdocs-material) and is hosted by [GitLab Pages](https://docs.gitlab.com/ee/user/project/pages/).
+
 ## Create a new worker using our template
 
 ```