Phase 2.1: Backend project initialized with Docker configuration

- Created Cargo.toml with all required dependencies
- Implemented health/ready endpoints
- Added Docker configuration (production + development)
- Configured docker-compose with resource limits
- Set up MongoDB service with persistence
- Verified build (cargo check passed)
- Prepared monorepo structure for mobile/web/shared

Next: Phase 2.2 (MongoDB connection and models)

backend/.env.example

@@ -0,0 +1,8 @@
+RUST_LOG=info
+SERVER_HOST=0.0.0.0
+SERVER_PORT=8000
+MONGODB_URI=mongodb://mongodb:27017
+MONGODB_DATABASE=normogen
+JWT_SECRET=change-this-to-a-random-secret-key
+JWT_ACCESS_TOKEN_EXPIRY_MINUTES=15
+JWT_REFRESH_TOKEN_EXPIRY_DAYS=30