refactor: migrate backend framework from Express to NestJS

src/serials/serials.module.ts

@@ -0,0 +1,9 @@
+import { Module } from '@nestjs/common';
+import { SerialsService } from './serials.service';
+import { SerialsController } from './serials.controller';
+
+@Module({
+  controllers: [SerialsController],
+  providers: [SerialsService],
+})
+export class SerialsModule {}