Document Docker deployment for partners

https://redmine.teklia.com/issues/6934

content/deployment/_index.md

++++
+title = "Deployment"
+sort_by = "weight"
+weight = 90
+insert_anchor_links = "right"
++++
+
+This documentation is aimed at system administrators and business leaders who want to deploy the Arkindex platform on their own hardware.
+
+In this section you'll find out how to:
+
+1. setup [Arkindex](@/deployment/setup.md), in production mode,