Fix logging in Sandstorm.

bootstrap/app.php

@@ -50,8 +50,9 @@ $app->singleton(
     FireflyIII\Exceptions\Handler::class
 );
 
-/* Overrule logging */
-$app->configureMonologUsing(
+/* Overrule logging if not Sandstorm */
+if (!(env('IS_SANDSTORM') === true)) {
+    $app->configureMonologUsing(
         function (Logger $monolog) use ($app) {
 
             $interface = php_sapi_name();
@@ -78,7 +79,8 @@ $app->configureMonologUsing(
             $handler->setFormatter($formatter);
             $monolog->pushHandler($handler);
         }
-);
+    );
+}
 
 /*
 |--------------------------------------------------------------------------