Configure a proxy for your API calls with Angular CLI

**NOT FOR PRODUCTION, DEVELOPMENT ONLY** During development, you often end up in the situation where you have your backend API server running at one address (i.e. localhost:3000) while your frontend development server runs on another (i.e. localhost:4200). In this video we will learn how to configure your Angular CLI setup to get the best development experience, by proxying your API calls to the correct backend server.