title: How to copy non-ts files to dist when building typescript?
body: <p>I have Mail module in folder with this structure:</p>
  
  <pre><code>- Mail
    - templates
        - &lt;Handlebars files&gt;
    - mail.module.ts
  </code></pre>
  
  <p>When I build (compile) TypeScript project, my <code>template</code> folder is not included in <code>build</code> folder.
  How to move those kind of files into <code>dist</code> when building?</p>
  
  <p>Is it different for development vs production builds?</p>