Update apps-advanced.md

Should run migration to import yii tbl_user if not the sign up/login may report error.

docs/guide/apps-advanced.md

@@ -35,8 +35,8 @@ php /path/to/yii-application/init
 ---
 2. Create a new database. It is assumed that MySQL InnoDB is used. If not, adjust `console/migrations/m130524_201442_init.php`.
 3. In `common/config/params.php` set your database details in `components.db` values.
-
-4. Set document roots of your Web server:
+4. Apply migrations with console command 'yii migrate'.
+5. Set document roots of your Web server:
 
 - for frontend `/path/to/yii-application/frontend/web/` and using the URL `http://frontend/`
 - for backend `/path/to/yii-application/backend/web/` and using the URL `http://backend/`