Add analytics

[jdm]

It would be interesting to see how many visitors the page gets, and how many issue links are clicked.

[Coder206]

@jdm Perhaps we could use Google Analytics? I also heard you can use a Service Worker to do some analytics even when the device is offline, see https://serviceworke.rs/api-analytics.html

[mishra-prabhakar]

@jdm Any updates on this? Have we decided on the approach? GA or any other analytics?

[jdm]

I have not put any thought into it since filing it.