✨ Add OpenAPI docs

src/main.ts

@@ -1,12 +1,29 @@
 import { ValidationPipe } from '@nestjs/common';
 import { NestFactory } from '@nestjs/core';
-import { AppModule } from './app.module';
 import helmet from 'helmet';
+import { AppModule } from './app.module';
+import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
+import { promises } from 'fs';
+import { join } from 'path';
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
+
   app.useGlobalPipes(new ValidationPipe());
   app.use(helmet());
+
+  const pkg = JSON.parse(
+    await promises.readFile(join('.', 'package.json'), 'utf8'),
+  );
+
+  const options = new DocumentBuilder()
+    .setTitle('API')
+    .setDescription('API description')
+    .setVersion(pkg.version)
+    .build();
+  const document = SwaggerModule.createDocument(app, options);
+  SwaggerModule.setup('api', app, document);
+
   await app.listen(3000);
 }
 bootstrap();