[wip] dockerfile: use dockerx to cache local modules

[fridrik01]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.74%. Comparing base (787c467) to head (d986fe9).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2839      +/-   ##
==========================================
+ Coverage   60.69%   60.74%   +0.04%     
==========================================
  Files         348      348              
  Lines       16137    16137              
==========================================
+ Hits         9795     9803       +8     
+ Misses       5590     5582       -8     
  Partials      752      752              

see 1 file with indirect coverage changes

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