system health 추가

backend/src/system/system.module.ts

@@ -0,0 +1,9 @@
+import { Module } from '@nestjs/common';
+import { SystemController } from './system.controller';
+import { SystemService } from './system.service';
+
+@Module({
+  controllers: [SystemController],
+  providers: [SystemService],
+})
+export class SystemModule {}