feat: 优化项目目录结构

apps/backend/src/oss/oss.module.ts

@@ -0,0 +1,9 @@
+import { Module } from '@nestjs/common';
+import { OssService } from './oss.service';
+import { OssController } from './oss.controller';
+
+@Module({
+  providers: [OssService],
+  controllers: [OssController],
+})
+export class OssModule {}