Is your feature request related to a problem? Please describe.
I would like to know the current version of my lk-jwt-service binary. This helps with keeping uptodate.

Describe the solution you'd like
I would like to be able to call lk-jwt-service --version, which returns a line: lk-jwt-service version 0.3.0

Describe alternatives you've considered
I could write a text file when building the library.

Additional context
I have prepared a PR for this.