feat(docs): add Swagger/OpenAPI endpoints for center and guild services

Fabric.Backend.Center/src/main.ts

@@ -1,6 +1,7 @@
 import 'reflect-metadata';
 import { ValidationPipe } from '@nestjs/common';
 import { NestFactory } from '@nestjs/core';
+import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';
 import { AppModule } from './app.module';
 
 function requireEnv(name: string): string {
@@ -34,6 +35,15 @@ async function bootstrap() {
       transform: true,
     }),
   );
+
+  const swaggerConfig = new DocumentBuilder()
+    .setTitle('Fabric Backend Center API')
+    .setDescription('Identity Hub APIs for Fabric')
+    .setVersion('1.0.0')
+    .build();
+  const swaggerDoc = SwaggerModule.createDocument(app, swaggerConfig);
+  SwaggerModule.setup('docs', app, swaggerDoc);
+
   const port = process.env.PORT ? Number(process.env.PORT) : 7001;
   await app.listen(port);
   console.log(`Fabric.Backend.Center listening on :${port}`);