title: (Angular 2+) How to get deploy-url after build?
body: <p>I need to know the build time information(<code>ng build --this_information</code> or from <code>angular.json</code>), such as <code>deploy_url</code> or <code>base_href</code> at runtime.</p>
  
  <p>For <code>base_href</code>, I can read the <code>href</code> attribute of <code>&lt;base&gt;</code> tag instead, but there is no any alternative for <code>deploy_url</code>.</p>
  
  <p>Can someone give me an "Angular way" to read build configurations at runtime?</p>
  
  <h1>I don't want to change build configurations at runtime, but just want to read and print.</h1>