message: docs(env): added CORS_PROXY to .env.example for the react package
diff: REACT_STORYBOOK_SOURCEMAPS=<Boolean to turn on/off sourcemaps in storybook>
  +CORS_PROXY=<CORS proxy server for fetching from www.ibm.com, e.g. https://yourproxy.com/>
  #Feature Flags
  LOCALE_SELECTOR=<Boolean flag to turn on/off the locale selector>
  