(bool) env('PUSH_ENABLED', false), 'ttl' => (int) env('PUSH_TTL', 600), 'vapid' => [ 'public_key' => env('PUSH_VAPID_PUBLIC_KEY'), 'private_key' => env('PUSH_VAPID_PRIVATE_KEY'), 'subject' => env('PUSH_VAPID_SUBJECT', env('APP_URL', 'mailto:support@example.com')), ], ];