Add comment to docs

Author: bcb

docs/installation.md

@@ -27,3 +27,6 @@ Test the server:
 $ curl -X POST http://localhost:5000 -d '{"jsonrpc": "2.0", "method": "ping", "id": 1}'
 {"jsonrpc": "2.0", "result": "pong", "id": 1}
 ```
+
+`serve` is good for serving methods in development, but for production use
+`dispatch` instead.