update for backurl

@@ -15,8 +15,10 @@ const renderData = {
 
 // 奥莱首页控制器
 exports.index = (req, res) => {
+    let backUrl = '//m.yohobuy.com/' +  req.yoho.channel;
     let headerData = headerModel.setNav({
         navTitle: 'OUTLET',
+        backUrl: backUrl,
         navBtn: false
     });