## Defining .env file --- ### React client environment variables - REACT_APP_API_ROOT: Domain root for react app api - REACT_APP_DOMAIN_ROOT: Domain root for react app - BUILD_PATH: Path for client build folder ### Courier client - COURIER_AUTH_TOKEN: Authorization token for courier client ### Node environment variables - NODE_ENV: Node environment - PORT: Default node port ### Production database information - DB_USERNAME: Production database username - DB_PASSWORD: Production database password - DB_HOST: Production database host ip - DB_NAME: Production database name