Moving ActionCable over to Webpacker

This week, I upgraded a little demo application for my book Deployment from Scratch from Rails 6 to Rails 6.1. Since I showcase WebSockets with ActionCable and Redis, I needed to move the ActionCable CoffeeScript from Sprockets to Webpacker.I started with dependencies. The original application could lose uglifier as Sprockets’ JavaScript processor and coffee-rails in favour of JavaScript. I replaced them with webpacker gem in Gemfile:.