Dockerfile: added airflow constrains

[ErnestaP]

No description provided.

[codecov-commenter]

Codecov Report

Merging #180 (dd7eb4c) into main (cb6dd8f) will decrease coverage by 0.60%.
Report is 11 commits behind head on main.
The diff coverage is 86.88%.

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@@            Coverage Diff             @@
##             main     #180      +/-   ##
==========================================
- Coverage   93.22%   92.62%   -0.60%     
==========================================
  Files          94      105      +11     
  Lines        4189     4598     +409     
==========================================
+ Hits         3905     4259     +354     
- Misses        284      339      +55     

Files	Coverage Δ
dags/common/cleanup.py	100.00% <100.00%> (ø)
dags/common/parsing/parser.py	100.00% <ø> (ø)
dags/common/pull_ftp.py	100.00% <100.00%> (ø)
dags/common/utils.py	85.06% <100.00%> (+2.75%)	⬆️
dags/elsevier/sftp_service.py	100.00% <100.00%> (ø)
dags/iop/repository.py	100.00% <ø> (ø)
dags/springer/repository.py	92.10% <ø> (ø)
tests/integration/aps/test_utils.py	84.21% <ø> (-0.41%)	⬇️
...ests/integration/elsevier/test_files_harvesting.py	100.00% <100.00%> (ø)
tests/units/elsevier/test_elsevier_parser.py	100.00% <100.00%> (ø)
... and 11 more

[pamfilos]

not needed. should be taken care of by the constraints..if it is not installed by the constraints, we should investigate which library needs it, and check if we should install differently

[ErnestaP]

Constraints files are requirements files that only control which version of a requirement is installed, not whether it is installed or not. Their syntax and contents is nearly identical to Requirements Files.
https://pip.pypa.io/en/stable/user_guide/#constraints-files

[pamfilos]

ok ..what i mean is:

for postgres, we shouldnt have psycopg2==2.9.6 or psycopg2-binary==2.9.6, but install it as apache-airflow[celery, postgres]==2.6.0

this way it will install all dependencies that are needed for postgres, and use the constraints for choosing a version

[pamfilos]

in the same way, we should try to see which package tries to install connexion and why the constraints dont work

[pamfilos]

in the same way, we should try to see which package tries to install connexion and why the constraints do not work