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Closes functionsへのDOS対策
概要
express-rate-limitでDOS攻撃への対策
変更内容
Cloud Functions, Firestoreを大量に呼び出すとレスポンスの低下と費用の増大に繋がるので、express-rate-limitを導入
現時点では
の2つでセットしてあるが、今後APIの使用状況に応じて適宜変更する
確認方法
limitを極端に小さくして、エミュレーターを使いPostmanで制限を超えるまでPostリクエストをする(Getリクエストの場合はキャッシュが効いて制限がかからない可能性がある)
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