Support yarn start server being accessed at subpath

[moodysalem]

I am trying to incorporate create-react-app to migrate an existing node server project

I want to do so by having all requests to /spa/* be reverse proxied to a separate single page application server

It's easy enough to do the reverse proxy with the production build files, thanks to the homepage package.json attribute-I can actually put /spa/ in there and the index.html is generated with the correct paths

However, in development I want to be able to run yarn start alongside the existing node server and proxy /spa/* to localhost:3000/* and see the script and link tags generated to /spa/ subpaths, e.g. /spa/static/js/main.[hash].js

[gaearon]

Is this the same as #1582?

[moodysalem]

Yep, thanks @gaearon