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/test/mocks/subscription.ts

@@ -0,0 +1,54 @@
+import { Subscription } from 'src/subscriptions/entities/subscription.entity';
+import { SubscriptionPeriod } from 'src/subscriptions/enums/periods.enum';
+import { PaymentStatus } from 'src/subscriptions/enums/status.enum';
+import { SubscriptionType } from 'src/subscriptions/enums/types.enum';
+import { createUser } from './user';
+import { User } from 'src/users/entities/user.entity';
+
+type SubscriptionParameters = {
+  type?: SubscriptionType;
+  period?: SubscriptionPeriod;
+  status?: PaymentStatus;
+  createdAt?: Date;
+  user?: User;
+};
+
+export const createSubscription = ({
+  type = 'enthusiast',
+  period = 'monthly',
+  status = 'succeeded',
+  createdAt = new Date(),
+  user,
+}: SubscriptionParameters): Subscription => ({
+  id: 'ab2b9b1b0-0b1b-4b1b-8b1b-2b1b3b1b4b1b5',
+  stripeId: 'sub_123',
+  status,
+  type,
+  period,
+  userId: 'a2b9b1b0-0b1b-4b1b-8b1b-2b1b3b1b4b1b5',
+  user,
+  createdAt,
+  flashEvents: [],
+});
+
+export const audienceMonthlyStripe = createSubscription({
+  type: 'enthusiast',
+  period: 'monthly',
+  user: createUser(),
+});
+
+export const rssAddonMonthlyStripe = createSubscription({
+  type: 'rss-addon',
+  period: 'monthly',
+});
+
+export const verificationAddonMonthlyStripe = createSubscription({
+  type: 'verification-addon',
+  period: 'monthly',
+});
+
+export const audienceMonthlyRejectedStripe = createSubscription({
+  type: 'enthusiast',
+  period: 'monthly',
+  status: 'rejected',
+});