using-winston.js

let LOG_FILE = parseInt((new Date()).getTime() / 1000);
let winston = require('winston');

winston.remove(winston.transports.Console);

winston.add(winston.transports.File, {
  "name": "debug-log",
  "json": false,
  "filename": `log/${LOG_FILE}-debug.log`,
  "level": "debug"
});

winston.add(winston.transports.File, {
  "name": "info-log",
  "json": false,
  "filename": `log/${LOG_FILE}-info.log`,
  "level": "info"
});