title: Include assets when building angular library
body: <p>I am building a library which contains a custom icon font. However, when I build my library using <code>ng build &lt;library-name&gt; --prod</code>, the assets folder is not included in the build, which means icons do not show up when using the production build.</p>
  
  <p>I've tried multiple solutions like adding the <code>assets</code> array in <code>angular.json</code> and copying the assets folder to the created dist folder.</p>
  
  <p>I am using Angular 8, and the library was created using angular-cli.</p>
  
  <p>I tried including the fonts two ways: 
  using <code>@import url( '../assets/icon_font.css' );</code> in one of the style files and adding <code>../assets/icon_font.css</code> to styleUrls in one of the components that require it. (<code>icon_font.css</code> is the css file that includes the icon fonts)</p>
  
  <p>Here's the layout of my library directory: </p>
  
  <pre><code>- src
    - lib
      - assets
        - icon_font.css
        - font files
      - component that requires icons
        - style sheet that has @import icon_font.css
      - other components and classes
  </code></pre>
  
  <p>I would like the .ttf and other font files in the <code>assets/</code> directory to be available in the exported <code>dist</code> folder.</p>