Error was: ``` ERROR in chunk admin [entry] js/[name]-[contenthash].js Cannot use [chunkhash] or [contenthash] for chunk in 'js/[name]-[contenthash].js' (use [hash] instead) ```
The configuration keys have some issues across different versions of postcss
Most of this is automatically generated by the rake task: `bundle exec rake webpacker:install` Docs: https://github.com/rails/webpacker/tree/5-x-stable
