https://qiita.com/GenTamura84/items/38cf899827bba050a21c

assets precompile RAILS_ENV=production rake assets precompile .gitconfigから抜く .gitignoreからconfig/application.yamlを外す .gitignoreからpublic/assets/を外す jquery-ui-rails jquery-ui-railsをgemに追加 app/assets/javascripts/application.j…

brew install v8@3.15 bundle config --local build.libv8 --with-system-v8 bundle config --local build.therubyracer --with-v8-dir=/usr/local/opt/v8@3.15 bundle install