Fix "failed: ERR invalid DB index"

config/cache.php

@@ -80,6 +80,9 @@ return [
         'redis' => [
             'driver'     => 'redis',
             'connection' => 'default',
+            'password' => env('REDIS_PASSWORD', null),
+            'port' => env('REDIS_PORT', 6379),
+            'database' => env('REDIS_DB', 0),
         ],
 
     ],