app端：开始上课中，新增预约接口

lisy

2023-08-04 c70c9ecf1bee12e85778dc268308c872b95e477f

 cloud-server-management/src/main/java/com/dsh/course/service/ICityService.java

New file
@@ -0,0 +1,8 @@
package com.dsh.course.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.dsh.course.entity.City;
import com.dsh.guns.modular.system.model.TCity;

public interface ICityService extends IService<TCity> {
}