Adding Custom Environment Variables | Create React App

Note: this feature is available with react-scripts@0.2.3 and higher. Your project can consume variables declared in your environment as if they were declared locally in your JS files. By default you will have NODE_ENV defined for you, and any other environment variables starting with REACT_APP_. WARNING: Do not store any secrets (such as private API keys) in your React app! Environment variables a

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環境ごとの設定をbuild時に設定する