Optimize CarrierWave images using image_optim

Gemfile

gem 'carrierwave'
gem 'image_optim_rails'
gem 'image_optim_pack'

image_uploader.rb

class ImageUploader < CarrierWave::Uploader::Base
  process :optimize

  def optimize
    ::ImageOptim.new(Rails.configuration.assets.image_optim)
      .optimize_image!(current_path)
  end
end