56d62a52fd
[Current Environment Variables doc](https://nextjs.org/docs/basic-features/environment-variables#default-environment-variables) mentions `development` and `production` env options but nothing about `test`. Test env is a 3rd valid option, and actually has some implications for `.env.local` from [what I can see in load env configs mechanism](https://github.com/vercel/next.js/blob/canary/packages/next/lib/load-env-config.ts#L68). This PR aims to include corresponding `test` info for environment variables. |
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| .. | ||
| advanced-features | ||
| api-reference | ||
| api-routes | ||
| basic-features | ||
| routing | ||
| deployment.md | ||
| faq.md | ||
| getting-started.md | ||
| manifest.json | ||
| upgrading.md | ||