fix(react-scripts): add filter to load env vars (#4)

Author: hileomsi

packages/react-scripts/config/env.js

@@ -66,11 +66,11 @@ process.env.NODE_PATH = (process.env.NODE_PATH || '')
 
 // Grab NODE_ENV and REACT_APP_* environment variables and prepare them to be
 // injected into the application via DefinePlugin in Webpack configuration.
-// const REACT_APP = /^BKN_APP_/i;
+const REACT_APP = /^REACT_APP_/i;
 
 function getClientEnvironment(publicUrl) {
  const raw = Object.keys(process.env)
- // .filter(key => REACT_APP.test(key))
+ .filter(key => REACT_APP.test(key))
  .reduce(
  (env, key) => {
  env[key] = process.env[key];