mkdir プロジェクト名
cd プロジェクト名
yarn init
mkdir src dist
touch ./src/app.js
touch ./index.html
touch .babelrc
touch webpack.config.js
yarn add react react-dom
yarn add webpack --dev
yarn add babel-loader babel-core --dev
yarn add babel-preset-react --dev
yarn add babel-preset-es2015 --dev
yarn add babel-preset-stage-0 --dev
yarn add jsx-loader --dev
yarn add node-sass --dev
yarn run watch