Hands-on Node.js tutorials for backend development, testing, security, containers, Linux, and Kubernetes.
Measure event-loop delay and CPU cost before optimizing, capture a CPU profile, move genuinely CPU-bound work to a reusable worker pool, and avoid adding workers to ordinary asynchronous I/O.
Write isolated unit and HTTP tests with node:test, strict assertions, mocks, coverage reporting, deterministic cleanup, and a CI-friendly exit status.
Emit machine-readable JSON logs with severity, request correlation, durations, safe error serialization, and automatic redaction of credentials.
Apply secure HTTP headers, an explicit CORS allowlist, proxy-aware rate limiting, small request limits, and production-safe Express settings.
Inspect the dependency graph, run reproducible vulnerability audits, separate runtime from development exposure, apply compatible fixes, and review breaking upgrades manually.
Separate operational errors from programmer defects, expose liveness and readiness correctly, stop accepting traffic on termination, and bound graceful shutdown.
Run a Node.js service under systemd with a dedicated unprivileged account, protected filesystem access, restart policy, environment separation, journal logs, and zero-guesswork health checks.
Place Nginx in front of a loopback-only Node.js service, forward correct proxy metadata, support WebSockets, set timeouts, obtain TLS, and validate the complete request path.
Build a small Node.js 24 image with deterministic npm installation, a non-root runtime, signal-friendly startup, health endpoint, read-only filesystem compatibility, and targeted validation.
Run an application stack with Compose health checks, private service discovery, named persistence, runtime configuration, dependency readiness, and explicit backup and teardown procedures.
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