How Structured JSON Logging with Pino Solves Production Debugging in Next.js

A developer running a self-hosted Next.js site on a VPS with Coolify has shared a practical setup for structured logging using Pino, a fast JSON logger for Node.js. The approach replaces plain console.log calls with structured JSON output, where every log line carries named fields such as request ID, HTTP method, path, status code, and response time. Each incoming request is assigned a unique ID at the middleware level, allowing all related log lines to be traced and grouped together. The configuration outputs logs to stdout in line with twelve-factor app principles, leaving log rotation and shipping to the hosting platform rather than the application itself. The result is that production incidents can be investigated through simple queries on log fields instead of parsing unstructured text with fragile regular expressions.