Add a shortcode to embed a photo post in a blog post

layouts/shortcodes/photo.html

@@ -0,0 +1,8 @@
+{{- with $photoPage := $.Page.GetPage (printf "photos/%s" (.Get 0)) -}}
+    {{- $thumbnail := partial "images/photo_thumbnail.html" (dict "Page" . "Width" 1280 "Height" 1280) -}}
+    <a href="{{ .RelPermalink }}" title="{{ .Title }}">
+        <img src="{{ $thumbnail.RelPermalink }}" {{/*{{ with $altText }}alt="{{ . }}"{{ end }}*/}}>
+    </a>
+{{- else -}}
+    {{- errorf "No page matching '%s'" (.Get 0) -}}
+{{- end -}}