Rails × React で画像を読み込む方法 https://forestbook-freelance.com/2021/04/12/rails-x-react-%e3%81%a7%e7%94%bb%e5%83%8f%e3%82%92%e8%aa%ad%e3%81%bf%e8%be%bc%e3%82%80%e6%96%b9%e6%b3%95/