Update preview env documentation

[cte]

Important

Update preview environment documentation to include detached commands, tool version management, and environment variable usage.

• Documentation Updates:
  • Add keywords: Detached Commands, Tool Versions, mise to environments.mdx.
  • Update command execution to use detached: true instead of & in environments.mdx.
  • Add logfile option for detached commands in environments.mdx.
• Environment Variables:
  • Recommend using ROO_<NAME>_HOST variables for service communication.
  • Provide examples for setting API URLs at build time for Vite, Next.js, CRA.
  • Suggest writing ROO_API_HOST to .env files for frameworks using dotenv.
• Tool Management:
  • Document automatic tool installation using .tool-versions with mise in environments.mdx.

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Project	Deployment	Review	Updated (UTC)
roo-code-docs	Ready	Preview, Comment	Jan 29, 2026 6:16pm

[roomote]

Rooviewer   See task on Roo Cloud

Reviewed the preview environment documentation updates. Found 1 issue:

• Fastify CORS example uses an inline dynamic import pattern that may not work as expected

_{Mention @roomote in a comment to request specific changes to this pull request or fix all unresolved issues.}

[roomote]

The inline dynamic import pattern import('@fastify/cors') returns a Promise resolving to a module namespace object ({ default: ... }), not the plugin function directly. This may not work as expected with Fastify's register method. The standard pattern from Fastify's documentation is:

Suggested change

	app.register(import('@fastify/cors'), {
	origin: process.env.ROO_WEB_HOST || 'http://localhost:3000'
	});
	```
	import cors from '@fastify/cors';
	app.register(cors, {
	origin: process.env.ROO_WEB_HOST || 'http://localhost:3000'
	});

_{Fix it with Roo Code or mention @roomote and request a fix.}