[doc] add comments to critical sections of the application.properties file (docs/#89)

[antoinemzs]

Proposed changes

• More comments to help setting up the mandatory dependencies in application.properties

Related issues

• Contributes to Add doc on setting up : RabbitMQ , MinIO, Postgres docs#89

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 38.05%. Comparing base (2b9ace7) to head (940c2aa).
Report is 1 commits behind head on release/current.

Additional details and impacted files

@@                Coverage Diff                 @@
##             release/current    #2354   +/-   ##
==================================================
  Coverage              38.05%   38.05%           
  Complexity              1781     1781           
==================================================
  Files                    596      596           
  Lines                  18274    18274           
  Branches                1214     1214           
==================================================
  Hits                    6954     6954           
  Misses                 10962    10962           
  Partials                 358      358           

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