Asset Pipeline with React on Rails
In general, you should not be mixing the asset pipeline with rails/webpacker and React on Rails.
If you're using React, then all of your CSS and images should be under either /client
or
/app/javascript
or wherever you want your client side application.
If you are incrementally migrating a large application, your main concern will be how to minimize duplication of styles and images between your old application and the new one.
Please email justin@shakacode.com if you would be interested in help to migrate a larger application.