log files are not generated day wise

[mratanusarkar]

The day-wise logging is not working as expected.

For server code or scripts that are running for a long time (more than a day),
All the logs seem to be getting dumped into the first file that is generated during the first run.

The Ideal behavior should be: on a new day, a new log file should be generated with the file name as datetime.

The below code seems to be working for scripts (with limited runtime) that are manually run every time,
but not for code deployed on a server that is running 24x7.

// output file
let logDir = './logFiles/';
let date = new Date().toISOString().split('T')[0];
let errorFilePath = logDir + date + '-' + 'error.log';
let comboFilePath = logDir + date + '-' + 'combined.log';