headers->set('Strict-Transport-Security', 'max-age=31536000; includeSubDomains', true); $response->headers->set('X-Content-Type-Options', 'nosniff', true); $response->headers->set('X-Frame-Options', 'SAMEORIGIN', true); $response->headers->set('X-XSS-Protection', '1; mode=block', true); $response->headers->set('Referrer-Policy', 'strict-origin-when-cross-origin', true); return $response; } }