Created by: Subterrane
Allow specifying proxySetting via environment variable as well as by property in package.json
The proxy setting is an all or nothing affair and I have to explain to other devs on my team how to remove the proxy from the package.json file when they try to run in dev mode without a proxy. This is a little tiny change that allows setting a current configuration setting as an environment variable as well as in package.json, so technically I'm not ADDING a configuration.