Add a connectivity/internet check

There were some suggestions that poor internet quality might be causing issues with sessions. To debug this, we should be able to run some checks on the users internet connection.

We should test:
- Internet Speed
- Jitter
- Ping

between the pod and user.

Ideally, we could run these tests before starting a session, or at least be able to run it manually.

The way this should work is by hosting an endpoint inside the pod. This endpoint connects directly to the frontend and can be used to measure the metrics we want.