Create a new Config

Create a new Config from the given environment variables

It first gets the environment variables from the .env file in the current directory.

Variables

• LONGPORT_APP_KEY - App key
• LONGPORT_APP_SECRET - App secret
• LONGPORT_ACCESS_TOKEN - Access token
• LONGPORT_HTTP_URL - HTTP endpoint url
• LONGPORT_TRADE_WS_URL - Trade websocket endpoint url