Point docs at the landing page for newcomers

README.md

@@ -2,6 +2,10 @@
 
 **Private AI, governed together.**
 
+> **Not the docs you're looking for?** Start at the [website](https://inference.coop)
+> for the overview and how to join. These docs are the deeper reference for
+> members and contributors.
+
 The Inference Cooperative is a member-governed project providing private AI
 inference. Members pay dues on a sliding scale and, in return, get private AI
 chat and API access through shared, cooperatively governed infrastructure. We