chore: add swagger docs for ts api

lesson_26/api/javascript/api_app/package.json

@@ -24,6 +24,7 @@
     "@nestjs/common": "^10.0.0",
     "@nestjs/core": "^10.0.0",
     "@nestjs/platform-express": "^10.0.0",
+    "@nestjs/swagger": "^8.0.7",
     "reflect-metadata": "^0.2.0",
     "rxjs": "^7.8.1"
   },
@@ -68,4 +69,4 @@
     "coverageDirectory": "../coverage",
     "testEnvironment": "node"
   }
-}
+}

lesson_26/api/javascript/api_app/src/main.ts

@@ -1,11 +1,22 @@
 import { NestFactory } from '@nestjs/core';
 import { NestExpressApplication } from '@nestjs/platform-express';
+import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';
 import { AppModule } from './app.module';
 
 async function bootstrap() {
   const app = await NestFactory.create<NestExpressApplication>(AppModule);
   app.enableCors();
   app.set('trust proxy', 'loopback'); // Trust requests from the loopback address
+
+  const config = new DocumentBuilder()
+    .setTitle('Library API')
+    .setDescription('An API for managing a library of media items')
+    .setVersion('1.0')
+    .addTag('library')
+    .build();
+  const documentFactory = () => SwaggerModule.createDocument(app, config);
+  SwaggerModule.setup('api', app, documentFactory);
+
   await app.listen(3000);
 }