Navigate to `test.localhost:3000/comm` which still resolves to the node server but has different origin.
- without any changes I'm getting: `Access to fetch at 'http://localhost:3000/comm/get_initial_redux_state' from origin 'http://test.localhost:3000' has been blocked by CORS policy`
- after these changes and changing the `facts/commapp_url.json` to `http://test.localhost:3000` the request went through
Adding @ashoat as reviewer because of new dependency.