patch: ssl styling and default value check

[aarnphm]

What does this PR address?

Fixes some styling from #2886

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• Does the code follow BentoML's code style, both make format and make lint script have passed (instructions)?
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• Did your changes require updates to the documentation? Have you updated
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• Did you write tests to cover your changes?

[codecov]

Codecov Report

Merging #2899 (8643d93) into main (a48d83e) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #2899   +/-   ##
=======================================
  Coverage   70.93%   70.93%           
=======================================
  Files         103      103           
  Lines        9334     9335    +1     
=======================================
+ Hits         6621     6622    +1     
  Misses       2713     2713           

Impacted Files	Coverage Δ
bentoml/_internal/configuration/containers.py	80.81% <100.00%> (+0.11%)	⬆️

[aarnphm]

Unit test has been failing, will fix in different PR.