Change default days to 30 for daily channel

config/logging.php

@@ -49,7 +49,7 @@ return [
             'driver' => 'daily',
             'path' => storage_path('logs/laravel.log'),
             'level' => 'debug',
-            'days' => 7,
+            'days' => 30,
         ],
 
         'slack' => [