Render Cloudflare Region Data for a Request Using

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Up until now, we've been rendering plain responses, not based on any information coming in with a request. The object sent with every incoming HTTP request to a Workers function has a ton of interesting information, including the regionality of the request, and which Cloudflare data center is responding to the request. Using this information, we'll render a dynamic HTML page based on where the user visiting our site is in the world.