Retrofitting HomeflowJS to Existing Themes
If you are adding HomeflowJS to an existing theme you'll need to install it, as well as its peer dependencies:
$ yarn add homeflowjs react react-dom redux react-redux react-router-dom
You should then copy across the webpack/ directory from the theme_boilerplate project here:
Theme boilerplate Webpack directory
Ensure you have a src/ directory containing an entries/ directory.