title: Why are my CSS files ignored with Angular CLI when in prod mode?
body: <p>I have what I think is a standard .angular-cli.json file.  In apps[0] it has:</p>
  
  <pre><code>  "styles": [
      "styles.css",
      "../node_modules/bootstrap/dist/css/bootstrap.min.css"
    ],
  </code></pre>
  
  <p>The above works fine with an "ng build" or an "ng serve".  However, if I do an "ng build --prod" these two css files are ignored.  The way I am getting around this is by using a CDN version of bootstrap.min.css and adding styles.css to a publicly available resource (Azure blog storage) and then referencing them from index.html.</p>
  
  <p>FWIW, if I do an "ng serve --prod" it still works in my localhost/dev environment.  But "ng build --prod" does not.</p>
  
  <p>Any ideas where to start?</p>