apply suggestions by @pabzm

Co-authored-by: Pablo Zmdl <57864086+pabzm@users.noreply.github.com>
Signed-off-by: Simon L. <szaimen@e.mail.de>

php/src/Controller/DockerController.php

@@ -119,7 +119,7 @@ readonly class DockerController {
         $nonbufResp = $this->startStreamingResponse($response);
         $addToStreamingResponseBody = $this->getAddToStreamingResponseBody($nonbufResp);
 
-        $this->listBackup();
+        $this->listBackup($addToStreamingResponseBody);
 
         // End streaming response
         $this->finalizeStreamingResponse($nonbufResp);