update preview date

src/Schedule/schedule.module.ts

@@ -1,8 +1,9 @@
 import { Module } from '@nestjs/common'
 import { ScheduleSchema } from './schedule.schema'
+import { ScheduleService } from './schedule.service'
 
 @Module({
-  providers: [ScheduleSchema],
-  exports: [ScheduleSchema],
+  providers: [ScheduleSchema, ScheduleService],
+  exports: [ScheduleSchema, ScheduleService],
 })
 export class ScheduleModule {}