Docs: Revert "Add canonical tags and enforce no trailing slashes"

[JonnyBurger]

Summary

• Reverts Docs: Add canonical tags and enforce no trailing slashes #7086 which caused 404 "Page Not Found" errors on the docs site
• Reopens SEO: remotion.dev pages have no canonical tags and serve duplicate content at trailing-slash variants #7076

Why it broke

The trailingSlash: false Docusaurus config setting changes the build output format from page/index.html (directory-based) to page.html (file-based). On Vercel, the existing routing expected directory-based output, so pages became unreachable — resulting in 404 errors for visitors.

Even though cleanUrls: true was added to the Vercel config to compensate, it wasn't sufficient to handle all existing URL patterns, particularly those without .html extensions that relied on the index.html convention.

Made with Cursor

[pullfrog]

Reviewed PR #7105 — approved. Clean exact revert of #7086 with no issues found.

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[vercel]

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Project	Deployment	Actions	Updated (UTC)
bugs	Ready	Preview, Comment	Apr 20, 2026 3:28pm
remotion	Ready	Preview, Comment	Apr 20, 2026 3:28pm

[pullfrog]

Reviewed — no issues found. Clean exact revert of #7086 (3 lines removed across 2 files). The rollback rationale is sound — trailingSlash: false changes Docusaurus build output from page/index.html to page.html, which broke Vercel routing.

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