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/transcoding-server/transcoding-server.module.ts

@@ -0,0 +1,14 @@
+import { Module } from '@nestjs/common';
+import { TranscodingServerService } from './transcoding-server.service';
+import { BullModule } from '@nestjs/bullmq';
+
+@Module({
+  imports: [
+    BullModule.registerQueue({
+      name: 'transcode',
+    }),
+  ],
+  providers: [TranscodingServerService],
+  exports: [TranscodingServerService],
+})
+export class TranscodingServerModule {}