Separate SITE VARS in `settings.py`

[john0isaac]

It's better to separate the site_vars into a separate file and calling it settings.py as it's taking lots of space in the app.py

settings.py

SITE_VARS = {
...
} 

and in app.py
import SITE_VARS from settings

and app.site_vars.update(SITE_VARS)

Originally posted by @john0isaac in #17 (comment)