Add config.ini files to allow setting up default value for arguments

Add a config.ini file to allow to set the default value of each argument in Drive.

The .ini is like :
[DEFAULT]
env=PROD

[PROD]
log-level-console=INFO

[DEBUG]
log-level-console=TRACE

This way you can switch from one settings to another easily. You can set all the arguments you would normally do from the command line.