Add explanation of docs structure

Signed-off-by: David Martin <[email protected]>

docs/getting-started.md

@@ -14,3 +14,14 @@ To use Kuadrant, the `LoadBalancer` service type is required for Gateways. kind
 
 * [Install with Helm](./install-helm.md)
 * [Install with OLM](./install-olm.md)
+
+## Further Reading
+
+The documentation on this site follows the [Diátaxis framework](https://diataxis.fr/) to better serve you, our users.
+This approach also helps us create new content and maintain existing material effectively.
+Under this framework, all content falls into one of four categories, accessible from the side navigation:
+
+* Concepts - (also called 'Explanations') Deepens and broadens your understanding of Kuadrant.
+* APIs & Reference - Provides concise descriptions of Kuadrant APIs for quick consultation.
+* Tutorials - Offers practical, step-by-step activities for you to safely try out.
+* Guides - Delivers goal-oriented instructions to help you solve specific problems in any environment.