dj_settings offers way to add project settings in a way that has been battle-tested for years
in numerous UNIX apps, reading from the value /etc/<config_file> or ~/.config/<config_file> or
/path/to/project/<config_file> or an ENV VAR, allowing overriding from the next read location.
All of them allow overriding /path/to/config/file.ext with /path/to/config/file.ext.d/<filename>.ext.
It started by targeting django, but it has grown to be used as a general settings or config parser.
dj_settings will read from various config files to get the value of a variable, in a way
that's very familiar to all UNIX users. It allows setting default values, and overriding
with ENV VARs and .d directories.
