major/icanhaz ? reverse-engineered prompt

Build me a small Python web app that powers a handful of super simple public utility pages, like one that shows a visitor’s IP address, one that shows their reverse DNS name, one that prints their request headers, one that shows the current time as an epoch number, and one that helps reveal proxy and traceroute style request info.

Keep it lightweight and straightforward, since this is meant to be the code behind a few tiny websites, not a full product. I want the responses to be plain text and fast, with each endpoint doing one very clear thing. Make it easy to run and easy to deploy, and include a simple static site for any basic homepage or help text if needed.

If anything about the current best way to handle requests or headers has changed, look up current docs online and use that.