title: How to add/set environment Angular 6 angular.json file
body: <p>How do I specify the environment to use in Angular 6+? The <code>.angular-cli.json</code> file seems to have changed to <code>angular.json</code> from previous versions and with it the structure of the <code>json</code> within.</p>
  <p>How/where in this file do I specify the environments to use?</p>