final touches on README.

Author: James Fuqian

README.md

@@ -58,4 +58,7 @@ suggestions for best practices.
 Debugging server component
 --------------------------
 debugpy remote debugging enabled on port 5678 for server in docker compose, developer can attach to server from IDE e.g. vscode.
- 
+
+Error Responses and handling:
+-----------------------------
+[See ErrorResponses.md](./ErrorResponses.md)