message: docs(corsproxy): expanding on cors proxy documentation
diff: @@ -7,18 +7,57 @@ environment.
  A cors proxy can be configured using the following
  [environment variable](https://github.com/carbon-design-system/ibm-dotcom-library/blob/master/packages/react/docs/environment-variables.md):
  -`CORS_PROXY=https://myproxy.com/`
  +```
  +CORS_PROXY=https://myproxy.com/
  +```
  or for `create-react-app`:
  -`REACT_APP_CORS_PROXY=https://myproxy.com/`
  +```
  +REACT_APP_CORS_PROXY=https://myproxy.com/
  +```
  > NOTE: The `CORS_PROXY` is not necessary when publishing to production
  > (www.ibm.com). Be sure to either set `CORS_PROXY` as blank or leave it
  > unconfigured when pushing your application to production.
  +### How It Works
  +
  +The service call is prepended with the value of `CORS_PROXY`, utilizing a
  +proxying approach with the following proxy solution:
  +
  +- [CORS Anywhere](https://github.com/Rob--W/cors-anywhere)
  +
  +An example call:
  +
  +`https://myproxy.com/https://www.ibm.com/path/to/translation/file.json`
  +
  ### Available CORS Proxy server for local development
  Our team has an available cors proxy server that is available for testing on
  `localhost:3000` and `localhost:9000`. Reach out to us at #ibm-digital-design
  on slack for more information.
  +
  +### Alternative approach
  +
  +In lieu of the [CORS Anywhere](https://github.com/Rob--W/cors-anywhere)
  +prepending approach, the host for the translation service can also be
  +modified via the following environment variable:
  +
  +```
  +TRANSLATION_HOST=https://myproxy.com
  +```
  +
  +or for `create-react-app`:
  +
  +```
  +REACT_APP_TRANSLATION_HOST=https://myproxy.com
  +```
  +
  +This will generate the following call:
  +
  +`https://myproxy.com/path/to/translation/file.json`
  +
  +instead of
  +
  +`https://www.ibm.com/path/to/translation/file.json`
  