React CRA的.env加顺序

Note: this feature is available with react-scripts@1.0.0 and higher.

默认:

• npm start: .env.development.local, .env.local, .env.development, .env
• npm run build: .env.production.local, .env.local, .env.production, .env

参考:

https://create-react-app.dev/docs/adding-custom-environment-variables/