What problem does this feature solve?

In the docs for devServer.proxy, you link to this documentation : https://github.com/chimurai/http-proxy-middleware#context-matching, which contains multiple options for context maching, like exculsion, wich, I think, would be nice to have !

What does the proposed API look like?

// vue.config.js devServer: {	index: '',	proxy: {	'!\/dist\/*': {	target: 'http://127.0.0.1:8000'	}	} }