このエラーメッセージに関する原因と対処に関して説明します。
エラーメッセージ(英語)：
ec2 invalid host header
対処
関連リンク
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webpack-dev-serverで起動したアプリをlocalhostではなく0.0.0.0で外部に ...
https://tackeyy.com/blog/posts/how-to-access-app-through-the-ip-with-webpack-dev-server
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https://help.crossbrowsertesting.com/faqs/testing/invalid-host-header-error/
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https://qiita.com/tetsuya-zama/items/d6ffc28ed6d67abab037
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http://thebaker.hatenablog.com/entry/2018/10/09/153411