Add Documentation for Authentication Flow

[tuananh2508]

#Issue
We currently run Pyroscope in our K8s Cluster (installed by Helm) and using NodePort sevice type for it. But till now, I didn't see there is any option to secure the Pyroscope server ? Cause obviously we dont want some stranger can access the Service.
Thanks

[Rperry2174]

Glad to see that you're running Pyroscope! We actually added support for authentication in #272 which is included in the most recent release for Pyroscope.

The last step is that we need to document this feature so we will do that and then report back here.

[tuananh2508]

Thanks! Glad to hear. We looking forward for it !

[Rperry2174]

Thanks for closing @tuananh2508 we're planning on adding a little bit more here about some edge cases so let us know if you run into any issues.

In the meantime, looks like you found the documentaiton:
https://pyroscope.io/docs/auth-google