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 "Fixesadding 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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