Can't get CKEditor5 build from source working with Shakapacker, Rails 6, Vue 3

Question

I'm trying to implement CKEditor5 (building from source) into my application. I'm using Vuejs 3 frontend, Rails 6 backend, and Shakapacker.I haven't been able to find any documentation on CKEditor5 support for Shakapacker. I tried following the Webpack guide on the official CKEditor5 documentation, but I am getting 46 errors when running bin/webpack.The errors are all related to CKEditor CSS files. Does anyone know if there is a way to get CKEditor5 to work with Shakapacker? Thank you

webpack.config.js

custom.js

package.json image 1

package.json image 2

package.json image 3

I tried following the Webpack guide on the official CKEditor5 build from source documentation: https://ckeditor.com/docs/ckeditor5/latest/installation/advanced/alternative-setups/integrating-from-source.html I am getting 46 errors when running bin/webpack. The errors are all related to CKEditor CSS files.

the errors