Implement backend API and database services in Docker setup

- Added a new `api` service for the NestJS backend, including health checks and dependencies on PostgreSQL, Redis, and MinIO.
- Introduced PostgreSQL and Redis services with health checks and configurations for data persistence.
- Added MinIO for S3-compatible object storage and a one-shot service to initialize required buckets.
- Updated the Nginx configuration to proxy requests to the new backend API and MinIO storage.
- Enhanced the Dockerfile to support the new API environment variables and configurations.
- Updated the `package.json` and `package-lock.json` to include new dependencies for QR code generation and other utilities.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/season/dto/response/season.dto.ts

@@ -0,0 +1,29 @@
+import { ContentDTO } from 'src/contents/dto/response/content.dto';
+import { Season } from 'src/season/entities/season.entity';
+
+export class SeasonDTO {
+  id: string;
+  projectId: string;
+  seasonNumber: number;
+  rentalPrice: number;
+  title?: string;
+  description?: string;
+  isActive: boolean;
+  createdAt: Date;
+  updatedAt: Date;
+  contents?: ContentDTO[];
+
+  constructor(season: Season) {
+    this.id = season.id;
+    this.projectId = season.projectId;
+    this.seasonNumber = season.seasonNumber;
+    this.rentalPrice = season.rentalPrice;
+    this.title = season.title;
+    this.description = season.description;
+    this.isActive = season.isActive;
+    this.createdAt = season.createdAt;
+    this.updatedAt = season.updatedAt;
+    this.contents =
+      season?.contents?.map((content) => new ContentDTO(content)) || [];
+  }
+}