Migrate base URL from archive.sparkpost.com to docs.sparkpost.com

[PauloJeunonSousa]

Context

Follow-up to #855 (the support.sparkpost.com → archive.sparkpost.com migration). This moves the site's canonical host to docs.sparkpost.com and 301-redirects the old archive.sparkpost.com host to it. The site stays noindex so it doesn't compete with bird.com in search — this is a host rename, not a re-indexing.

Changes

• next-sitemap.js — default siteUrl → https://docs.sparkpost.com. disallow: ['/'] kept, so generated robots.txt still emits Disallow: /; Host/Sitemap and all sitemap URLs now read docs.sparkpost.com.
• netlify.toml
  • Added a forced host-based 301 as the first redirect rule so archive traffic lands on docs before any path rule fires:

    [[redirects]]
      from = "https://archive.sparkpost.com/*"
      to = "https://docs.sparkpost.com/:splat"
      status = 301
      force = true

  • CSP font-src: archive.sparkpost.com → docs.sparkpost.com.
  • Kept X-Robots-Tag = "noindex, nofollow"; refreshed its comment (it referenced the deleted edge function).
• Removed netlify/edge-functions/host-conditional-noindex.ts — its job was keeping support.sparkpost.com indexable during the CloudFront gap; support is now off Netlify. Reverted the tsconfig.json netlify exclude that existed only for it.

components/site/seo.tsx is unchanged — the <meta name="robots" content="noindex, nofollow"> stays. Markdown content links untouched, as in #855.

Verification

• Ran next-sitemap locally: robots.txt → Disallow: /, Host: https://docs.sparkpost.com, Sitemap: https://docs.sparkpost.com/sitemap.xml; sitemap URLs under docs.sparkpost.com. ✅

Notes / out of scope

• Assumes this Netlify deploy is configured (domain aliases + DNS) to serve both archive.sparkpost.com and docs.sparkpost.com. That setup lives outside the repo; the redirect only fires once both hosts reach this deploy.
• X-Robots-Tag now applies to every host with no carve-out (the edge function is gone). Correct given docs is meant to stay noindex and support is off Netlify.

🤖 Generated with Claude Code

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Note

Medium Risk
Host-level 301s and global noindex headers affect all traffic and SEO signals; misconfigured DNS or redirect ordering could break archive links or indexing expectations.

Overview
Renames the site’s canonical host from archive.sparkpost.com to docs.sparkpost.com while keeping the docs property noindex (unchanged seo.tsx meta, X-Robots-Tag, and robots.txt Disallow: /).

next-sitemap.js now defaults siteUrl to https://docs.sparkpost.com, so generated sitemap/robots Host and URLs point at docs.

netlify.toml adds a forced, first host rule: https://archive.sparkpost.com/* → https://docs.sparkpost.com/:splat (301). CSP font-src is updated from archive.sparkpost.com to docs.sparkpost.com. The X-Robots-Tag comment is rewritten to match the post-migration setup (no host-specific SEO exceptions).

Removes netlify/edge-functions/host-conditional-noindex.ts, which previously kept support.sparkpost.com indexable during migration; tsconfig.json no longer excludes netlify now that the edge function is gone.

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