feather/_includes/icons.html

<section class="section icons">
  <div class="container icons-container">
    {% for icon in site.data.icons %}
      {% capture icon_path %}icons/{{ icon }}.svg{% endcapture %}
      <div class="feather-icon">
        {% include_relative {{ icon_path }} %}
      </div>
    {% endfor %}
  </div>
</section>