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/jest-e2e.json

@@ -0,0 +1,13 @@
+{
+  "moduleFileExtensions": ["js", "json", "ts"],
+  "rootDir": "..",
+  "testEnvironment": "node",
+  "testRegex": ".e2e-spec.ts$",
+  "moduleNameMapper": {
+    "^src/(.*)$": "<rootDir>/src/$1"
+  },
+  "transform": {
+    "^.+\\.(t|j)s$": "ts-jest"
+  },
+  "setupFilesAfterEnv": ["<rootDir>/test/setup.ts"]
+}