change permissions of reconversions directory

src/Controller/FluxController.php

@@ -261,7 +261,7 @@ class FluxController extends AbstractController
         //projectDir is composer.json
         $dir = $this->getParameter('kernel.project_dir') . "/reconversions";
         if (!is_dir($dir)) {
-            mkdir($dir, 0777, true);
+            mkdir($dir, 0755, true);
         }
 
         $path = $dir . "/" . $filename;