doc: update doc/README.md

doc/README.md

@@ -1,9 +1,24 @@
-## User Documentation
+# Puter Documentation
+
+## Users
+
+If you have general questions about using [Puter](https://puter.com),
+our [community Discord](https://discord.gg/PQcx7Teh8u) and
+[subreddit](https://www.reddit.com/r/puter/) are good places
+to ask questions.
+
+## Deployers
 
 - [Hosting Instructions](./self-hosters/instructions.md)
 - [Domain Setup](./self-hosters/domains.md)
 - [Support Levels](./self-hosters/support.md)
 
+## App Developer Links
+- [developer.puter.com](https://developer.puter.com)
+- [docs.puter.com](https://docs.puter.com)
+- share your apps on [Reddit](https://www.reddit.com/r/puter/) or
+  [Discord](https://discord.gg/PQcx7Teh8u)
+
 ## Contributor Documentation
 
 ### Where to Start