feat：完善信息

config/system.go

@@ -16,10 +16,13 @@ const (
 	ServePort string = "serve_port" // 服务器端口
 )
 
+const (
+	WechatForAppID string = "appid"
+)
+
 const (
 	UploadPath   string = "upload_path"   // 上传路径
 	UploadExt    string = "upload_ext"    // 上传文件限制
 	UploadSize   string = "upload_size"   // 上传文件大小限制
 	UploadRename string = "upload_rename" // 上传文件是否重命名
-
 )