Add ability to attribute photos in posts

archetypes/posts.md

@@ -13,4 +13,7 @@ resources:
   src: ""
   params:
     description: ""
+    attribution:
+      name: ""
+      link: ""
 ---

layouts/_default/single.html

@@ -18,6 +18,13 @@
           <source srcset="{{ $featured.Permalink }}">
           <img src="{{ $featured.Permalink }}" {{ with .Params.description -}} alt="{{ . }}" {{- end }}>
         </picture>
+        {{ with .Params.attribution -}}
+          <small>Picture by&nbsp;
+            {{- with .link }}<a href="{{ . }}" target="_blank" rel="noreferrer noopener">{{ end -}}
+            {{- .name -}}
+            {{- with .link }}</a>{{ end -}}
+          </small>
+        {{- end }}
         {{- end }}
         {{ if .Params.toc -}}
           <h2>Contents</h2>