fix: resolve 404 on refresh for React Router routes on Vercel (#10)

[umsungjun]

Summary by CodeRabbit

• Chores
  • Added deployment configuration to properly handle client-side routing in production environment.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
react-head-safe	Ready	Preview, Comment	Feb 2, 2026 10:35am

[coderabbitai]

📝 Walkthrough

Walkthrough

A new Vercel deployment configuration file is added to the examples/basic directory, specifying a rewrite rule that directs all requests to index.html for single-page application routing.

Changes

Cohort / File(s)	Summary
Vercel Configuration examples/basic/vercel.json	Adds Vercel deployment config with rewrite rule routing all requests to index.html.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A config file hops in with grace,
Redirecting routes to their rightful place,
Vercel now knows where to send the way,
To index.html, come what may! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: adding a Vercel configuration to fix 404 errors on refresh for React Router routes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/vercel-404-on-refresh

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Codecov Report

✅ All modified and coverable lines are covered by tests.

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