Structured Logging for Node.js

Short summary

Tutorial on implementing structured logging in Node.js using pino and nestjs-pino, replacing brittle console.log strings with queryable JSON fields. Explains why unstructured logs break at scale when aggregators like CloudWatch or Datadog must regex-parse them. Includes NestJS integration code with redaction of credentials, serializers, and pretty-printing for development.

• •Structured logs emit JSON objects with named fields instead of parseable strings
• •pino with nestjs-pino is the recommended default for NestJS backends
• •Redact sensitive headers and tokens in initial config, not as an afterthought

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