docs: clarify nuxi start command usage

[PetroSilenius]

❓ Type of change

• 📖 Documentation (updates to the documentation, readme or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

nuxi start command isn't easily understandable to be an alias for the preview command and might get misunderstood as the command to run the nuxt application in production. The difference between the two is fairly small but unnecessarily loading the .env file should be avoided.

npx nuxi start --help gives this info about the start command

> Usage: npx nuxi preview|start [--dotenv] [rootDir]

⋮ Launches nitro server for local testing after nuxi build.

Use npx nuxi [command] --help to see help for each command

Also linked the Deployment section of the docs so it's clear where to look for instructions on deploying your application after previewing it

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

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[nuxt-studio]

✅ Live Preview ready!

Name	Edit	Preview	Latest Commit
Nuxt Docs	Edit on Studio ↗︎	View Live Preview	10c5153

[PetroSilenius]

That was super fast, thanks! 🏎️

[danielroe]

Thank you ❤️