Added missing import needed to correctly show flags (related to #583)

[vania-pooh]

No description provided.

[codecov]

Codecov Report

Merging #610 into master will decrease coverage by 0.14%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master    #610      +/-   ##
=========================================
- Coverage   78.34%   78.2%   -0.15%     
=========================================
  Files          12      12              
  Lines        1367    1367              
=========================================
- Hits         1071    1069       -2     
- Misses        226     228       +2     
  Partials       70      70

Flag	Coverage Δ
#unittests	78.2% <ø> (-0.15%)	⬇️

Impacted Files	Coverage Δ
main.go	66.02% <ø> (ø)	⬆️
service/docker.go	80.25% <0%> (-0.65%)	⬇️

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