added initial swagger docs

src/app.module.ts

@@ -1,5 +1,5 @@
 import { Module } from '@nestjs/common';
-import { AppController } from './app.controller';
+import { HealthcheckController } from './healthcheck.controller';
 import { TypeOrmModule } from '@nestjs/typeorm';
 import { MerchantsModule } from './merchants/merchants.module';
 import { TagsModule } from './tags/tags.module';
@@ -40,6 +40,6 @@ import { ConfigModule, ConfigService } from '@nestjs/config';
     SubCategoriesModule,
     ExpensesModule
   ],
-  controllers: [AppController]
+  controllers: [HealthcheckController]
 })
 export class AppModule { }

src/healthcheck.controller.ts

@@ -1,7 +1,7 @@
 import { Controller, Get } from '@nestjs/common';
 
 @Controller()
-export class AppController {
+export class HealthcheckController {
   @Get('healthcheck')
   health() {
     return { status: 'healthy' };

src/main.ts

@@ -1,11 +1,20 @@
 import { NestFactory } from '@nestjs/core';
 import { AppModule } from './app.module';
 import { NestExpressApplication } from '@nestjs/platform-express';
+import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';
 
 async function bootstrap(): Promise<void> {
   const app = await NestFactory.create<NestExpressApplication>(AppModule);
-  app.enableCors();
-  app.setGlobalPrefix(process.env.PREFIX ?? 'common-cents');
+  const appPrefix = process.env.PREFIX ?? 'common-cents';
+  const config = new DocumentBuilder()
+    .setTitle('Common Cents API')
+    .setDescription('Documentation for Common Cents API')
+    .setVersion('1.0')
+    .build();
+  const documentFactory = () => SwaggerModule.createDocument(app, config);
+  SwaggerModule.setup(appPrefix + '/docs', app, documentFactory);
+  app.enableCors(); // TODO: Research if this is worth worrying about
+  app.setGlobalPrefix(appPrefix);
   await app.listen(process.env.PORT ?? 3000);
 }
 void bootstrap();