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/subscriptions/helpers/subscription.helper.ts

@@ -0,0 +1,35 @@
+import { SubscriptionType } from '../enums/types.enum';
+
+export const getBenefits = (type: SubscriptionType) => {
+  if (type === 'rss-addon') {
+    return 'the ability to publish your content through RSS and automatically reach your audience';
+  }
+  return 'access to the Screening Room with exclusive films, series, and music videos';
+};
+
+export const getPurchaseUrl = (type: SubscriptionType) => {
+  const frontendUrl = process.env.FRONTEND_URL || 'https://indeehub.studio';
+  if (type === 'rss-addon') {
+    return `${frontendUrl}/add-ons`;
+  }
+  return `${frontendUrl}/subscription`;
+};
+
+export const getSubsctriptionName = (type: SubscriptionType) => {
+  const formattedType = formatSubscriptionType(type);
+  if (type === 'rss-addon') {
+    return 'RSS Add-on';
+  }
+  return formattedType + ' Subscription';
+};
+
+/**
+ * Capitalizes the first letter of each word and removes hyphens.
+ * Example: 'film-buff' => 'Film Buff'
+ */
+export const formatSubscriptionType = (type: SubscriptionType): string => {
+  return type
+    .split('-')
+    .map((word) => word.charAt(0).toUpperCase() + word.slice(1))
+    .join(' ');
+};