build: use podman for image creation

[aparcar]

• custom package repositories
• update documentation
• update docker-compose or replace with Podman-compose
• add cleanup mechanism
• [ ]

[codecov]

Codecov Report

Patch coverage: 82.51% and project coverage change: +0.86 🎉

Comparison is base (6a995b6) 85.61% compared to head (df3a50a) 86.48%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #478      +/-   ##
==========================================
+ Coverage   85.61%   86.48%   +0.86%     
==========================================
  Files          13       13              
  Lines        1161      932     -229     
==========================================
- Hits          994      806     -188     
+ Misses        167      126      -41     

Impacted Files	Coverage Δ
asu/metrics.py	100.00% <ø> (ø)
asu/janitor.py	70.19% <55.00%> (-4.81%)	⬇️
asu/asu.py	81.53% <66.66%> (+2.43%)	⬆️
asu/build.py	80.90% <69.11%> (+0.71%)	⬆️
tests/conftest.py	94.28% <86.20%> (+1.04%)	⬆️
tests/test_common.py	98.27% <95.23%> (-1.73%)	⬇️
asu/common.py	94.69% <96.72%> (+1.70%)	⬆️
asu/api.py	67.72% <100.00%> (-4.18%)	⬇️
tests/test_api.py	100.00% <100.00%> (ø)
tests/test_janitor.py	100.00% <100.00%> (ø)
... and 1 more

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