[Docs] `app.config.ts` must be in the source directory, which is not necessarily the root

[jsulpis]

Hi, I see that there is a closed issue about that, but I still think the documentation is misleading:

The documentation clearly says that app.config.ts must be located at the root of a project. But as Daniel said in the previous issue, it must be in the srcDir, so if we change it in nuxt.config.ts, it is no more the root.

Here is what I suggest:

• reword slightly the paragraph in Get Started > Configuration > App Configuration (or add a little "info panel" ?) to mention the source directory instead of root
• update the folder structure in the nuxt config reference to show the app.config.ts in the src folder (and maybe app.vue too ?)

I would be happy to do the PR if you want

[pi0]

Surely PR welcome to clarify app configuration section it is in the source directory not root.

Regarding folder structure, i belive to keep it simple, we can add a note before/after that this structure is relative to srcDir option.

BTW regarding why, rootDir defines the build time root of a Nuxt project while src is the runtime. And app.config is a runtime configuration and compiled same as other source code and .ts/.vue files.

[jsulpis]

Thank you for your feedback and explaination, here is the PR.
I don't understand "we can add a note before/after that this structure is relative to srcDir option." (not sure we talk about the same thing), so I only reworded the sentence in the configuration section. Tell me if you want me to update something else.