Cleanup Jenkins Docker setup

[uhafner]

No description provided.

[github-actions]

☀️   Quality Monitor

   🚦   Tests: 98 % successful (✔️ 95 passed, 🙈 2 skipped)
   〰️   Line Coverage: 91% (62 missed lines)
   ➰   Branch Coverage: 92% (19 missed branches)
     Mutation Coverage: 80% (75 survived mutations)
     CheckStyle: No warnings
     PMD: No warnings
     SpotBugs: No warnings

Created by Quality Monitor v1.9.0 (#00b9b1a). More details are shown in the GitHub Checks Result.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.99%. Comparing base (a929ca2) to head (894522a).
Report is 16 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1094      +/-   ##
============================================
+ Coverage     88.98%   88.99%   +0.01%     
  Complexity      181      181              
============================================
  Files            11       11              
  Lines           717      718       +1     
  Branches         93       93              
============================================
+ Hits            638      639       +1     
  Misses           62       62              
  Partials         17       17              

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