fix(index): use our version

[avivkeller]

Fixes #88

[cursor]

PR Summary

Low Risk
Single build-config flag with no auth, data, or runtime logic changes.

Overview
Disables doc-kit’s automatic index page generation by adding a jsx-ast block in doc-kit.config.mjs with generateIndexPage: false, so the published site uses the repo’s own index instead of the toolkit default (addresses the learn index issue).

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Project	Deployment	Actions	Updated (UTC)
nodejs-learn	Ready	Preview	Jun 5, 2026 2:16am

[github-actions]

👋 Codeowner Review Request

The following codeowners have been identified for the changed files:

Team reviewers: @nodejs/nodejs-website

Please review the changes when you have a chance. Thank you! 🙏

[Copilot]

Pull request overview

This PR updates the Doc Kit build configuration to stop generating a synthetic index.html via the jsx-ast generator, so the Learn site’s homepage can be driven by the repository’s own content rather than an auto-generated (and currently empty) index page.

Changes:

• Disable Doc Kit’s jsx-ast synthetic index page generation (generateIndexPage: false).

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[bmuenzenmeyer]

fast-tracking - obviously broken