hugo/docs/layouts/shortcodes/fileindex.html

<table style="width=100%">
<th>Size in bytes</th>
<th>Name</th>
{{$dir := .Get "dir"}}
{{ $url := .Get "baseurl" }}

{{ $files := ReadDir $dir }}
    {{ range $files }}
			<tr>
                <td>{{.Size}}</td>
                <td>
                    <a href="{{$url}}{{.Name | urlize }}"> {{.Name}}</a>
                    </td>
            </tr>
	 {{ end }}
</table>