docs: Don't specify a specific port

Fixes #94

Author: epage

getting-started.md

@@ -25,11 +25,15 @@ $ cobalt init
 
 #### Preview
 
-Serve your site at `127.0.0.1:3000`
+To serve your site locally, run:
 ```console
 $ cobalt serve
+Building from `.` into `/tmp/.tmpgYpScM`
+Watching . for changes
+Serving /tmp/.tmpgYpScM through static file server
+Server Listening on http://localhost:1024
+Ctrl-c to stop the server
 ```
-This provides live reload; it will re-generate your site as you add or change content.
 
 #### Add a Page