feat: shut down all listeners on bad JWKS init

[pawels-optimizely]

Summary

• The "what"; a concise description of each logical change
• Another change

The "why", or other context.

Issues

• "THING-1234" or "Fixes adding dockerhub support #123"

[codecov]

Codecov Report

Merging #169 into master will decrease coverage by 0.14%.
The diff coverage is 50%.

@@           Coverage Diff            @@
##           master   #169      +/-   ##
========================================
- Coverage   80.14%    80%   -0.15%     
========================================
  Files          35     35              
  Lines        1556   1560       +4     
========================================
+ Hits         1247   1248       +1     
- Misses        241    244       +3     
  Partials       68     68

Impacted Files	Coverage Δ
pkg/server/server_group.go	84.37% <0%> (-5.63%)	⬇️
pkg/server/server.go	87.83% <80%> (-1.06%)	⬇️

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