首页更改为index文件

epdc-resident-mp-yushan/app.json

@@ -1,7 +1,7 @@
 {
     "pages": [
-        "pages/welcome/welcome",
         "pages/index/index",
+        "pages/welcome/welcome",
         "pages/toRegister/toRegister",
         "pages/heart/heart",
         "pages/mine/mine",