Winston timestamps in logfiles and MongoDB is not equal

Question

I have a winston logger in my express app which logs entries to logfiles and my MongoDB database. The timestamp for the entries in my logfiles are in the correct local timezone, but the timestamp in MongoDB is automatically set to UTC.

Log entries

Log entries in MongoDB

Here is my logger module defined in my application

My winston logger

The timezone for the logfile entries was automatically set to UTC to begin with, but when I formatted the entries as such format: format.combine(format.timestamp({ format: 'YYYY-MM-DD HH:mm:ss'}),format.json()), the logfiles entries were set to my local timezone. How can I update the MongoDB entries to be automatically set to my local timezone?