[단순코드] Node.js 로거 모듈 winston/winston-daily-rotate-file 초기화

logger.prototype.init = function(){ if(this.writer != null){ return; } this.writer = winston.createLogger({ transports: [ new (winstonDaily)({ name: 'info-file', filename: path.join(utils.LOG_PATH, './server_%DATE%.log'), datePattern: 'YYYY-MM-DD', colorize: false, maxsize: 50000000, maxFiles: 1000, level: 'info', showLevel: true, json: false, timestamp: time_stamp_format, format: winston.format..