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
    }
}

I do not believe you can control the proxy feature through the environment files. An alternative could be to define your api domains in your environment files

// environment.ts
export const environment = {
    production: false,
    api: 'http://localhost:3000'
};

// environment.prod.ts
export const environment = {
    production: true,
    api: 'http://api.exampledomain.com'
}

then in your ts source files pull the domain from the environment file

// some service
import { Injectable } from '@angular/core';
import { environment } from '../../../environment.ts';
import { Http } from '@angular/http';

@Injectable()
export class SomeService {
    constructor(private http: Http);

    getData(){
        return this.http.get(environment.api + '/rest-of-api');
    }
}

now when you run your build or serve commands they will use the api path defined in the environment file