blog/themes/gruvbox/layouts/_default/summary.html

<article>
    <div>
        <h2><a href="{{ .RelPermalink }}">{{ .Title }}</a></h2>
        {{ .Summary }}
    </div>
    {{ if .Truncated }}
    <div>
        <a href="{{ .RelPermalink }}">read more...</a>
    </div>
    {{ end }}
</article>