Add Milligram css to your Rails app using Webpacker with this app template.

milligram_css.rb

# rails app:template LOCATION=https://gist.githubusercontent.com/ajazfarhad/53eb05cfd435840d09a6ab5037d7e955/raw/f8c4e850665e800d357da5f0c2555bd84a7ee679/milligram_css.rb

def yarn(package)
  run("yarn add #{package}")
end

yarn 'milligram'

inject_into_file 'app/views/layouts/application.html.erb', before: '</head>' do <<~EOF
  <%= stylesheet_pack_tag 'application', media: 'all', 'data-turbolinks-track': 'reload' %>
 EOF
end
  
inject_into_file 'app/javascript/packs/application.js' do <<~EOF
  import 'milligram/dist/milligram.css'
EOF
end