Add Random resource retrieval and navigation.

server/service/resource.go

@@ -255,3 +255,12 @@ func EditResource(uid, rid uint, params *ResourceCreateParams) error {
 	}
 	return nil
 }
+
+func RandomResource() (*model.ResourceDetailView, error) {
+	r, err := dao.RandomResource()
+	if err != nil {
+		return nil, err
+	}
+	v := r.ToDetailView()
+	return &v, nil
+}