Different proxy config based on environment in Angular 2 CLI

How can I declare 2 different proxy URLs for development and production environments in Angular 2 CLI project? For example, while in development mode, I would like to use

{
    "/api/*": {
        "target": "http://localhost:3000",
        "secure": false
    }
}

but in production mode, I will use

{
    "/api/*": {
        "target": "http://api.exampledomain.com",
        "secure": false
    }
}