discovery.dpppt.org is not accessible

[vladcocos]

Hello. First of all, congratulations on this project, it's very helpful and well written and documented.

I am trying to integrate DP-3T into an app for my research paper. I installed the demo app, the calibration app and also integrated the SDK into my app (using this React Native module) and all of them result in the same error: SYNC_ERROR_NETWORK. The logs from the calibration app show this: "Unable to resolve host 'discovery.dpppt.org'." I see that this page does not exist anymore, so the error makes sense. Apart from this error, I want to learn what does this discovery page actually do. Does this error affect how I can use my app and the backend? I am using the 'prestandard' tag as GAEN is not available in my country.

Thanks.