Initial Go web server with Web Awesome hello world

CLAUDE.md

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+- DO NOT add comments to code unless something is *incredibly* subtle
+- Use e.g. map[string]bool{} instead of make() wherever possible
+- Use all-lowercase log messages
+- Prepend log messages with [ERROR] if applicable
+- Don't mention claude in commit messages. Keep them to a single, short, descriptive sentence
+- Always push after commiting
+- Use git add -A so you don't miss files when committing
+- Never use go build -- use go run instead
+- DO NOT commit unless asked to