faulty.equipment/themes/fesite/layouts/_default/_markup/render-image.html

<figure width="100%">
  <a href="#{{ .Destination | md5 }}-lightbox"
    ><img src="{{ .Destination | safeURL }}" alt="{{ .PlainText }}"
  /></a>
  <figcaption>
    {{ if .Title }}
    <p>{{ .Title | markdownify }}</p>
    {{ else if .Text }}
    <p>{{ .Text | htmlUnescape }}</p>
    {{ end }}
  </figcaption>
</figure>
<a href="#_" class="lightbox" id="{{ .Destination | md5 }}-lightbox">
  <img src="{{ .Destination | safeURL }}" alt="{{ .PlainText }}" />
</a>