Feature: Add logging

[dmltdev]

Add logger from https://github.com/winstonjs/winston Log all important parts of the app that you consider to be important. Remember to use different log types where appropriate: log.info() | log.debug() | log.error().

Use two log transports:

• Console transport
• File transports (logs messages to the same directory in the combined.log file)

[dmltdev]

With #5, you can mark this as done and close it.

[dmltdev]

@androsov-d