feat(templates): deprecate server templates

[clarkdo]

According to the discussion for core team meeting, as Nuxt has published new programmatic API and nuxt/functions will be released soon, so members think we suggest users using serverMiddleware as server-side first choice and remove all server templates in create-nuxt-app.

TODO:

• serverMiddleware template example
• post or article for Nuxt official suggestion and guide /cc @atinux @pi0

[clarkdo]

@nuxt/core-team , could you give this pr a review ?

[atinux]

Good for me 🙌

[robbylucia]

I see the suggestions for replacing what was removed in this PR:

Use nuxt-render https://nuxtjs.org/api/nuxt-render or serverMiddleware https://nuxtjs.org/api/configuration-servermiddleware

But neither of these are as easy as selecting "Express" during initialization-- or is it? Will there be something re-added to create-nuxt-app to bring back the one-click setup for Nuxt apps?

[wizardpisces]

Where can we see the so called various reasons about why removing the server template? I could see the necessity of it...
From my perspective, it's another feature which only increasing the mental burden and nothing more.
Forgive my ability to understand the new docs, so we are stuck to Connect middleware ?
I could not find where to switch to koa or express middleware, anyone found it? Please give me some tip...

[pi0]

Hi and sorry for not communicating properly on this change. Please continue following up #563.