$ npx create-react-app react-tutorial
$ cd react-tutorial
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$ npm start
$ git clone https://github.com/basyura/react-tutorial.git
$ cd react-tutorial
$ npm update
$ npm start
$ npx create-react-app react-tutorial
$ cd react-tutorial
・・・編集・・・
$ npm start
$ git clone https://github.com/basyura/react-tutorial.git
$ cd react-tutorial
$ npm update
$ npm start