Improve the logging system in the backend

[slavcho]

Which area(s) of Podkrepi.bg are affected? (leave empty if unsure)

Storage, Security

Describe the feature you'd like to request

Currently the log is unorganized and very robust. We want to improve this by using some advanced logger. We should be able to have different log levels, log to file, rolling files and what not.

Describe the solution you'd like

This seems like a popular option: https://www.npmjs.com/package/nest-winston

Describe alternatives you've considered

No response