添加登录和后端校验

完成后端设计（未在本仓库体现），通过安全的手段完成了登录鉴权

dist/app.json

@@ -0,0 +1 @@
+{"pages":["pages/index/index","pages/shop/index","pages/shop/detail/index","pages/product/index","pages/diy/index","pages/diy/stickerEdit/index","pages/checkout/index","pages/designList/index","pages/orders/index","pages/profile/index","pages/service/index","pages/wordcloud/index","pages/orderDetail/index","pages/address/index","pages/settings/index","pages/agreement/index","pages/userDatabase/index"],"window":{"backgroundTextStyle":"dark","navigationStyle":"custom","navigationBarTextStyle":"black"},"tabBar":{"custom":true,"list":[{"pagePath":"pages/index/index","text":"首页"},{"pagePath":"pages/shop/index","text":"商品"},{"pagePath":"pages/designList/index","text":"设计清单"},{"pagePath":"pages/orders/index","text":"订单"},{"pagePath":"pages/profile/index","text":"我的"}]}}