docs: update Hyperindex client env var names

[Kzoeps]

Summary

• rename the client-facing Hyperindex backend env var in the docs to NEXT_PUBLIC_HYPERINDEX_URL
• document that HYPERINDEX_URL falls back to NEXT_PUBLIC_HYPERINDEX_URL
• note that Hyperindex normalizes these URLs by trimming whitespace, removing trailing slashes, and adding https:// when needed

Summary by CodeRabbit

• Documentation
  • Updated environment variable documentation to clarify Hyperindex URL configuration for both client and server environments.
  • Added details on URL normalization behavior, including whitespace trimming and automatic https:// scheme handling.
  • Refreshed deployment instructions for Railway and Next.js setup.

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Project	Deployment	Actions	Updated (UTC)
hypercerts-atproto-documentation	Ready	Preview, Comment	Apr 21, 2026 9:05am

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 88e71325-78f7-48e0-89f8-9da67ed6a016

📥 Commits

Reviewing files that changed from the base of the PR and between a922c63 and 8cd2c76.

📒 Files selected for processing (1)

• pages/tools/hyperindex.md

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📝 Walkthrough

Walkthrough

Documentation update to Hyperindex deployment guide replacing NEXT_PUBLIC_API_URL with NEXT_PUBLIC_HYPERINDEX_URL for browser-side configuration. Clarified server-side fallback behavior and documented URL normalization (whitespace trimming, trailing-slash removal, https defaulting). Updated Railway deployment and troubleshooting sections accordingly.

Changes

Cohort / File(s)	Summary
Hyperindex Documentation pages/tools/hyperindex.md	Renamed browser-side environment variable from NEXT_PUBLIC_API_URL to NEXT_PUBLIC_HYPERINDEX_URL, added documentation for server-side fallback logic and URL normalization behavior, updated Railway deployment instructions and troubleshooting guidance.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• docs: clarify Hyperindex deployment configuration #111 — Modifies Hyperindex deployment documentation with environment-variable guidance and URL normalization behavior
• docs: clarify Hyperindex deployment variables and Railway setup #124 — Updates Hyperindex deployment docs in pages/tools/hyperindex.md with public-backend URL variable configuration changes

Poem

🐰 A rabbit hops through config lines so clear,
Where NEXT_PUBLIC_HYPERINDEX_URL now appears,
No trailing slashes, no whitespace fright,
The docs now glow with brilliant light! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: updating Hyperindex client environment variable names from NEXT_PUBLIC_API_URL to NEXT_PUBLIC_HYPERINDEX_URL in documentation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch update-hyperindex-env-vars

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