This module covers everything you need to take a Node.js application from development to production readiness. Environment configuration, structured logging, automated testing, CI/CD pipelines, containerization, performance optimization, monitoring, and security hardening — the practices that separate hobby projects from production systems.

Writing code that works on your laptop is easy. Writing code that runs reliably under load, can be debugged in the dark, can be deployed with confidence, and can withstand attacks — that’s the skill that defines a senior engineer. This module bridges the gap.

flowchart LR
    Config["5.1 Configuration"] --> Logging["5.2 Logging & Monitoring"]
    Logging --> Testing["5.3 Testing"]
    Testing --> Deploy["5.4 Deployment & CI/CD"]
    Deploy --> Perf["5.5 Performance"]
    Perf --> Cluster["5.6 Clustering & Containers"]
    Cluster --> Patterns["5.7 Design Patterns"]
    Patterns --> Security["5.8 Security"]

    style Config fill:#4f46e5,color:#fff
    style Testing fill:#059669,color:#fff
    style Deploy fill:#7c3aed,color:#fff
    style Security fill:#dc2626,color:#fff

Common questions: 12-factor app, horizontal scaling, graceful shutdown, memory leaks, zero-downtime deployment, rate limiting, DDoS prevention.