Place multiple icons in each element of list using html

I would like to have multiple icons shown at the left of each element, having the choice to place many or none, if y'all could point me to the right direction.

<header>
  <nav>
    <ul>
      <a href="http://localhost:4000/">
        <li class=" current btn-nav ">Blog</li>
      </a>
      <a href="http://localhost:4000/Projects">
        <li class=" btn-nav ">Projects</li>
      </a>
      <a href="http://localhost:4000/About">
        <li class=" btn-nav ">About</li>
      </a>
    </ul>
  </nav>
</header>

Thank you!