chore: 🤖 speed-up docker build

[severo]

in the next builds, the cache will be used if only src/ has been modified, which should help mostly with the workers/datasets_based image, because the poetry install of dependencies takes a lot of time.

[codecov-commenter]

Codecov Report

Base: 87.97% // Head: 87.92% // Decreases project coverage by -0.05% ⚠️

Coverage data is based on head (65e9b7e) compared to base (ac28b95).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #669      +/-   ##
==========================================
- Coverage   87.97%   87.92%   -0.06%     
==========================================
  Files          67       48      -19     
  Lines        2920     1623    -1297     
==========================================
- Hits         2569     1427    -1142     
+ Misses        351      196     -155     

Flag	Coverage Δ
jobs_mongodb_migration	84.33% <ø> (ø)
libs_libcommon	?
services_admin	88.85% <ø> (ø)
services_api	89.91% <ø> (ø)

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Impacted Files	Coverage Δ
libs/libcommon/src/libcommon/queue.py
libs/libcommon/tests/test_dataset.py
libs/libcommon/tests/test_simple_cache.py
libs/libcommon/src/libcommon/storage.py
libs/libcommon/tests/test_storage.py
libs/libcommon/src/libcommon/log.py
libs/libcommon/src/libcommon/config.py
libs/libcommon/tests/test_worker.py
libs/libcommon/src/libcommon/simple_cache.py
libs/libcommon/tests/test_worker_loop.py
... and 9 more

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[severo]

Merging, as the remaining issue is unrelated