Create-react-app has a whole bunch of extra stuff, like a testing library, various styling engines, HMR and other build tools that aren't included in your deplo

Create-react-app has a whole bunch of extra stuff, like a testing library, various styling engines, HMR and other build tools that aren't included in your deployed code anyway. Production React, on the other hand, appears to only have 2 deps: js-tokens and loose-envify