Fixing file name casing

src/Restful/restful.module.ts

@@ -0,0 +1,9 @@
+import { Module } from '@nestjs/common';
+import { RestfulController } from './restful.controller';
+import { RestfulService } from './restful.service';
+
+@Module({
+  controllers: [RestfulController],
+  providers: [RestfulService],
+})
+export class RestfulModule {}