Add option to configure feed items displayed in homepage

app/controllers/admin/widget/feeds_controller.rb

@@ -0,0 +1,16 @@
+class Admin::Widget::FeedsController < Admin::BaseController
+
+  def update
+    @feed = ::Widget::Feed.find(params[:id])
+    @feed.update(feed_params)
+
+    render nothing: true
+  end
+
+  private
+
+    def feed_params
+      params.require(:widget_feed).permit(:limit)
+    end
+
+end