增加预览图

config/config.json

@@ -0,0 +1,3 @@
+{
+  "Upload":"static/upload/"
+}

readme.md

@@ -23,11 +23,13 @@
 
 ### 项目预览
 
-![Image text](https://img2020.cnblogs.com/blog/726254/202006/726254-20200628213102562-970752675.jpg)
+![Image text](https://img2020.cnblogs.com/blog/726254/202009/726254-20200902141655838-534372058.jpg)
 
-![Image text](https://img2020.cnblogs.com/blog/726254/202006/726254-20200628213122308-1498566060.jpg)
+![Image text](https://img2020.cnblogs.com/blog/726254/202009/726254-20200902141707515-1201702349.jpg)
 
-![Image text](https://img2020.cnblogs.com/blog/726254/202006/726254-20200628213137942-667076789.jpg)
+![Image text](https://img2020.cnblogs.com/blog/726254/202009/726254-20200902141736713-1155907367.jpg)
+
+![Image text](https://img2020.cnblogs.com/blog/726254/202009/726254-20200902141745935-1312775469.jpg)
 
 
 ### 安装使用