remote ws url

when i use `launchServer()` i can fix the port
```
$server = $playwright->launchServer('chromium', [
    'headless' => false,
    'port' => 8191,
]);
```

How can i also the path to not get a new one every time i restart my container? 
'ws://localhost:8191/7e2ad3800e9579ccbde4cf9ef067ab00'