app/logger.ts


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import winston from 'winston';

const enumerateErrorFormat = winston.format((info) => {
    if (info instanceof Error) {
      Object.assign(info, { message: info.stack });
    }
    return info;
  });
  
export const logger = winston.createLogger({
    level: process.env.LOGGING_LEVEL === 'development' ? 'debug' : 'info',
    format: winston.format.combine(
        enumerateErrorFormat(),
        winston.format.colorize(),
        winston.format.splat(),
        winston.format.printf(({ level, message }) => `${level}: ${message}`)
    ),
    transports: [
        new winston.transports.Console({
            stderrLevels: ['error'],
        }),
    ],
});