quii/learn-go-with-tests ? reverse-engineered prompt

Build me a clean online book site for learning Go through tests and TDD. It should feel like a friendly tutorial, with a homepage, a table of contents, and lots of chapter pages that readers can move through easily. The content is mostly markdown style lessons, so make it easy to turn those pages into a readable book with nice typography, code blocks, and simple navigation.

I want it to cover the full journey from the basics of Go through building small tested apps, then more advanced testing topics and real world examples. It should also support exporting or presenting the content in a few formats like web, PDF, or ebook if that fits naturally. Keep the design simple, polished, and focused on reading. If you need to look up current docs or best practices for the framework you choose, go ahead and do that.