Made it possible to override entrypoint

[brurucy]

Quite often you have an image, and you want to change the ENTRYPOINT.

This is a very tiny change, all that I did was to create a new option.

[brurucy]

@orlangure I have tested it locally for side-effects, and it seems to work just fine.

[orlangure]

Hi @brurucy and thank you so much for your contribution!

I like the idea, but unfortunately I have a very busy schedule this week, so I will be able to take a closer look, merge the PR and prepare a new release a little bit later. I really hope to do that until the end of this week.

Thank you!

[codecov-commenter]

Codecov Report

Base: 85.80% // Head: 85.91% // Increases project coverage by +0.11% 🎉

Coverage data is based on head (192c088) compared to base (f6a5b27).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #711      +/-   ##
==========================================
+ Coverage   85.80%   85.91%   +0.11%     
==========================================
  Files          49       49              
  Lines        2310     2315       +5     
==========================================
+ Hits         1982     1989       +7     
+ Misses        170      169       -1     
+ Partials      158      157       -1     

Impacted Files	Coverage Δ
docker.go	89.56% <100.00%> (+0.09%)	⬆️
options.go	100.00% <100.00%> (ø)
preset/kafka/preset.go	79.10% <0.00%> (+1.49%)	⬆️

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[orlangure]

Fantastic, thank you!