Fix Quick Start: show alias setup before login

Login requires an existing alias and prompts for token interactively.

Author: max-lt

README.md

@@ -39,7 +39,10 @@ cargo install --git https://github.com/openworkers/openworkers-cli
 ## Quick Start
 
 ```bash
-# Login (opens browser)
+# Configure your API backend
+ow alias set prod --api https://dash.openworkers.com
+
+# Login (prompts for API token)
 ow login
 
 # Create and deploy a worker