gem 'config' ``` vendor/bundle 以下に config をインストール ``` $ bundle install --path vendor/bundle $ bundle exec rails g config:install create config/initializers/rails_config.rb create config/settings.yml create config/settings.local.yml create config/settings create config/settings/development.yml create config/settings/production.yml create config/settings/test.yml append .gitignore ``` gitignoreには自動で

