Test commit models_v2
Refactor model according to some forum
project refactoring in progress, working on the admin zone
Modified the database settings with ENVIRONMENT VARIABLE

The database settings in settings.py is now using dj_database_url to parse environment variable DATABASE_URL to get the parameter
DATABASE_URL has to be defined in the .bashrc as so :

export DATABASE_URL=postgres://ltbesh:pass@localhost:5432/ltbesh (for me)

and generally :
export DATABASE_URL=postgres://username:userpassword@localhost:5432/databasename