added categories resource

src/categories/categories.module.ts

@@ -0,0 +1,10 @@
+import { Module } from '@nestjs/common';
+import { CategoriesService } from './categories.service';
+import { CategoriesController } from './categories.controller';
+import { CategoryDataService } from './category-data.service';
+
+@Module({
+  controllers: [CategoriesController],
+  providers: [CategoriesService, CategoryDataService]
+})
+export class CategoriesModule { }