NestJS Core Knowledge Deep Knowledge : Use with technology: for comprehensive documentation. Module Structure Controller Service Key Decorators | Decorator | Purpose | |-----------|---------| | | Define module | | | Define controller | | | Mark as provider | | | HTTP methods | | | Request data | | | Apply guards | | | Apply pipes | Production Readiness Security Configuration Health Checks Logging Monitoring Metrics | Metric | Alert Threshold | |--------|-----------------| | Request latency p99 | 500ms | | Error rate (5xx) | 1% | | Memory usage | 80% | | CPU usage | 70% | | Active connections…