Shortcode figure.html
<!-- src alt caption -->
<figure>
<img src="{{ index .Params 0 }}" alt="{{ index .Params 1 }}">
<figcaption>{{ index .Params 2 }}</figcaption>
</figure>
<!-- Anwendung -->
{{% figure "/images/snow.jpg" "A snow day" "Snowy day" %}}
<!-- Das sind die index .Params 0, .Params 1 und .Params 2 -->