fix(tls): Pass certificate and private key files to listener method

[TwiN]

Summary

Fixes #530

Checklist

• Tested and/or added tests to validate that the changes work as intended, if applicable.
• Updated documentation in README.md, if applicable.

[codecov-commenter]

Codecov Report

Patch coverage: 20.00% and project coverage change: -0.12 ⚠️

Comparison is base (2f6b8f2) 81.69% compared to head (a2daac5) 81.58%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #531      +/-   ##
==========================================
- Coverage   81.69%   81.58%   -0.12%     
==========================================
  Files          56       56              
  Lines        4349     4350       +1     
==========================================
- Hits         3553     3549       -4     
- Misses        615      619       +4     
- Partials      181      182       +1     

Impacted Files	Coverage Δ
controller/controller.go	55.55% <0.00%> (-17.18%)	⬇️
config/web/web.go	93.10% <60.00%> (+11.28%)	⬆️

... and 1 file with indirect coverage changes

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