techdadi-express-starter-ts/starter-template/src/utils/logger.ts

CLI for creating a new Express TypeScript starter project

import { createLogger, format, transports } from 'winston';

const logger = createLogger({
  level: 'error',
  format: format.combine(
    format.timestamp(),
    format.errors({ stack: true }),
    format.splat(),
    format.json(),
  ),
  defaultMeta: { service: 'user-service' },
  transports: [
    new transports.File({ filename: 'error.log', level: 'error' }),
    new transports.File({ filename: 'combined.log' }),
  ],
});

if (process.env.NODE_ENV !== 'production') {
  logger.add(
    new transports.Console({
      format: format.combine(format.colorize(), format.simple()),
    }),
  );
}

export default logger;