added index date to file page

templates/file.html

@@ -24,16 +24,17 @@
     </div>
     </div>
 </div>
-{{if .Tags}}
 <div class="row">
     <div class="alert alert-secondary full-width">
+    {{if .Tags}}
         Tags
         {{range $t := .Tags}}
         <a href="/search?query=tags:{{$t}}" class="btn badge btn-primary tag">{{$t}}</a>
         {{end}}
+    {{end}}
+        <span class="float-right">{{.Created}}</span>
     </div>
 </div>
-{{end}}
 <div class="row">
     <embed src="{{.Data.Abs}}" toolbar="1" statusbar="1" navpanes="1"></embed>
 </div>