simpletheme/layouts/_default/category.html

{{ define "main" }}
<ul>
    {{range .Data.Pages}}
    <li>
        <a href="{{.RelPermalink}}">{{.Title}}</a>
    </li>
    {{end}}
</ul>
<div>
    <h3><a href="{{ .Site.BaseURL }}categories">Back to all categories</a></h3>
</div>

<script src="/js/dark.js"></script>
{{ end }}