[docs] [issue37860] Add netlify deploy preview for docs

New submission from Ashwin Ramaswami aramaswamis@gmail.com:

It would be good to preview the cpython documentation on PRs using Netlify.

See https://github.com/python/core-workflow/issues/348

---------- assignee: docs@python components: Documentation messages: 349752 nosy: docs@python, epicfaace priority: normal severity: normal status: open title: Add netlify deploy preview for docs versions: Python 3.9

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