2章 create-react-appのインストール /Users/shinriyo/.npm-global/bin/npm install -g create-react-app 実行 /Users/shinriyo/.npm-global/bin/create-react-app hello ./src/index.js 17:22-31 "export 'default' (imported as 'MultiForm') was not foun…

npm run buildしたあとに The project was built assuming it is hosted at the server root. To override this, specify the homepage in your package.json. For example, add this to build it for GitHub Pages: "homepage" : "http://myname.github.io/…