Add support for Docker Compose<22.0

[p-j-smith]

Fixes #597

• Remove use of profiles with docker compose
• Always expose the CLI_PIXL_DB_PORT on the postgres container
• Remove EXTERNAL_PIXL_DB env var as we're no longer using profiles
• Remove second postgres container used in integration tests; use the same postgres instance for PIXL DB and Orthanc Raw
• We can still have PIXL DB running in an external postgres instance (by setting the relevant env vars), but we're not testing for this in CI
• Update docs to reflect changes
• tested on dev instance on GAE

Description

Fixes #{issue_number}: A few words or sentences describing the changes proposed in this pull request (PR).

Type of change

Please delete options accordingly to the description.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Suggested Checklist

• I have performed a self-review of my own code.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have commented my code, particularly in hard-to-understand areas.
• I have passed on my local host device. (see further details at the CONTRIBUTING document)
• Make sure your branch is up-to-date with main branch. See CONTRIBUTING for a general example to syncronise your branch with the main branch.
• I have requested review to this PR.
• I have addressed and marked as resolved all the review comments in my PR.
• Finally, I have selected squash and merge

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.61%. Comparing base (3f3419c) to head (be4142a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #598      +/-   ##
==========================================
- Coverage   87.64%   87.61%   -0.03%     
==========================================
  Files          76       76              
  Lines        3512     3505       -7     
==========================================
- Hits         3078     3071       -7     
  Misses        434      434              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[tomaroberts]

Looks good Paul and just like it used to! 😆

Go for it.