x/pkgsite: add site version details to the bottom of pkg.go.dev pages

[myitcv]

What is the URL of the page with the issue?

https://pkg.go.dev/testing?tab=doc

What is your user agent?

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.66 Safari/537.36

Screenshot

What did you do?

Visited the aforementioned link.

What did you expect to see?

A site version identifier at the bottom of the page.

What did you see instead?

Nothing.

Adding a site version identifier will, I think, help with the reporting of issues and communication of when fixes/features land.

[mvdan]

We should also include the details to report feedback. Sending a private email is no longer the best method; using this issue tracker is.

[julieqiu]

Thanks for the suggestion @myitcv! At the moment, you can get site version information if you look at the page source and look at the version query param on any static asset, for example:

@mvdan - would you mind filing a separate issue for the feedback suggestion?

[julieqiu]

Closing this issue since you can view version details on the source page, and we now use the Go issue tracker for discussing feedback.