Documentation: Add docs for using nuxt-start/nitro

[blowsie]

What problem does this feature solve?

How to use nuxt-start

What does the proposed changes look like?

Include samples for environments like docker?

[blowsie]

Could be worth adding some related useful information to optimise builds such as; npm install --production

[debs-obrien]

Thanks for your contributions. We are now closing this repo as docs have now moved to nuxtjs.org using content module. Please continue your contributions on that site especially focusing on the guides folder which is the new docs. Thanks

https://github.com/nuxt/nuxtjs.org/blob/master/README.md

[atinux]

Actually, since we are planning to release Sigma to bundle the Nuxt app without having to install dependencies, I would postpone a bit this issue.

[atinux]

This would be documented in the Brige section.