Sync config files

config/broadcasting.php

@@ -20,9 +20,11 @@ return [
     | framework when an event needs to be broadcast. You may set this to
     | any of the connections defined in the "connections" array below.
     |
+    | Supported: "pusher", "redis", "log", "null"
+    |
     */
 
-    'default' => env('BROADCAST_DRIVER', 'pusher'),
+    'default' => env('BROADCAST_DRIVER', 'null'),
 
     /*
     |--------------------------------------------------------------------------
@@ -39,9 +41,9 @@ return [
 
         'pusher' => [
             'driver'  => 'pusher',
-            'key'     => null,
-            'secret'  => null,
-            'app_id'  => null,
+            'key'     => env('PUSHER_APP_KEY'),
+            'secret'  => env('PUSHER_APP_SECRET'),
+            'app_id'  => env('PUSHER_APP_ID'),
             'options' => [
                 //
             ],
@@ -56,6 +58,10 @@ return [
             'driver' => 'log',
         ],
 
+        'null' => [
+            'driver' => 'null',
+        ],
+
     ],
 
 ];