your template should look like this
<script id="Template" type="text/x-kendo-template">
<img src='/KodFazeBiljke/GetPhoto?id =${data.KodFazeBiljkeId}&thumb = true' alt='${data.KodFazeBiljkeId}" />
<dl>
<dd>${ data.OpisDvocifrenogKoda }</dd>
</dl>
</script>
you can set the template like this
.Height(300)
.Template('#Template')
here Template
is the template script ID