[next] return plain text 404 for `/_next/static/`

[devjiwonchoi]

Why?

When bots like Googlebot crawl a site, it gets the asset paths /_next/static/... from the <link> and <script> tags. As those asset paths may change over time, when Googlebot tries to sync the resources, it reaches a 404 page.

The problem is that Next.js returns an HTML 404 page, which lets bots consider that they've found an invalid 404 page.

How?

Return content type as plain text instead of HTML.

x-ref: https://github.com/vercel/next.js/pull/75111

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 115ecd41c2b5cbd8d2c18d99d4edae41992b8d1c

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@vercel/next	Patch
vercel	Patch

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[devjiwonchoi]

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