nodejs/src/utils/logger.ts

/**
 * Structured logging using Winston.
 * @module logger
 */

import winston from 'winston';

const { combine, timestamp, json, errors } = winston.format;

export const logger = winston.createLogger({
  level: process.env.LOG_LEVEL ?? 'info',
  format: combine(timestamp(), errors({ stack: true }), json()),
  transports: [
    new winston.transports.Console({
      format: winston.format.combine(
        winston.format.colorize(),
        winston.format.simple()
      ),
    }),
  ],
});