Documentation needed: client side only + nginx + server returning 404 responses

We need to supplement existing v4 documentation to add a quite elementary and common case: client-side (normal) rendering via v4 react-router, returning 404 server error, on custom styled error pages, on nginx.

I trawled many issues (like #3210) and it looks like everybody are rendering server-side or issues get closed too soon to allow meaningful discussion to reach the client-side rendering 404 error codes, or examples are outdated.

What about routing and responding with 404 server errors on client-side rendering web apps on Nginx?

It looks like I the only one on the Internet wanting to make Google-friendly web apps with custom, styled and meaningful 404 error pages returning correct error codes, and do it with minimal effort (client-side rendering using react-router (no fluxible, reduxible or whatnot), on create-react-app) 😀

[kerimdzhanov]

Here is a good example: https://gkedge.gitbooks.io/react-router-in-the-real/content/nginx.html

[abhionlyone]

In case someone is still looking for a configuration in Nginx:

location / {
  try_files $uri /index.html;
}