Component responsibility

apps/credential-manager/src/main.ts

+import type { MicroserviceOptions } from '@nestjs/microservices';
+
+import { VersioningType } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import { NestFactory } from '@nestjs/core';
+import { Transport } from '@nestjs/microservices';
+import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';
+
+import AppModule from './app.module.js';
+
+const app = await NestFactory.create(AppModule);
+const configService = app.get(ConfigService);
+app.enableCors();
+
+app.connectMicroservice<MicroserviceOptions>({
+  transport: Transport.NATS,
+  options: {
+    servers: [configService.get('nats').url],
+  },
+});
+
+app.enableVersioning({
+  defaultVersion: ['1'],
+  type: VersioningType.URI,
+});
+
+const swaggerConfig = new DocumentBuilder()
+  .setTitle('Gaia-X OCM Credential Manager API')
+  .setDescription('API documentation for Gaia-X OCM Credential Manager')
+  .setVersion('1.0')
+  .build();
+
+const document = SwaggerModule.createDocument(app, swaggerConfig);
+
+SwaggerModule.setup('/swagger', app, document);
+await app.startAllMicroservices();
+
+await app.listen(configService.get('PORT') || 3000);