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>

src/services/subscription.service.ts

@@ -46,6 +46,22 @@ class SubscriptionService {
     return apiService.post<ApiSubscription>(`/subscriptions/${subscriptionId}/resume`)
   }
 
+  /**
+   * Create a Lightning subscription invoice via BTCPay.
+   * Returns invoice details including BOLT11 for QR code display.
+   */
+  async createLightningSubscription(data: {
+    type: 'enthusiast' | 'film-buff' | 'cinephile'
+    period: 'monthly' | 'annual'
+  }): Promise<{
+    lnInvoice: string
+    expiration: string
+    sourceAmount: { amount: string; currency: string }
+    id: string
+  }> {
+    return apiService.post('/subscriptions/lightning', data)
+  }
+
   /**
    * Update payment method
    */