Add support to run apps as a Windows service

[pieterlouw]

I have found https://github.com/kardianos/minwinsvc to have the best and simplest way to add support to run apps as a Windows service

Fixes https://github.com/tmc/pqstream/issues/47

Should this be mentioned in the docs?

[codecov[bot]]

Codecov Report

Merging #48 into master will increase coverage by 2.02%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #48      +/-   ##
==========================================
+ Coverage   67.17%   69.19%   +2.02%     
==========================================
  Files           3        3              
  Lines         198      198              
==========================================
+ Hits          133      137       +4     
+ Misses         36       33       -3     
+ Partials       29       28       -1

[tmc]

How would this actually look as a user?

[tmc]

Ah I read that package.