Document settings import when using Caluma with django-environ / env files

[winged]

Caluma uses django-environ with a .env file in the project root. When using Caluma as an app, it will most likely be installed as a package. Then, the settings will look for the .env file relative to Caluma's location, not the project root.

django-environ reads the env vile and puts it in the process's environment variables.

Now, if your project used .env as well and write your settings file as it's documented ...

import environ
from caluma.settings.caluma import *  # noqa

env = environ.Env()
ROOT_DIR = environ.Path(__file__) - 2

ENV_FILE = env.str("DJANGO_ENV_FILE", default=ROOT_DIR(".env"))
if os.path.exists(ENV_FILE):  # pragma: no cover
    environ.Env.read_env(ENV_FILE)

What now happens is that the caluma settings are imported before django-environ reads the file; therefore Caluma won't have all it's settings set.

The correct way to do it would be to move the caluma settings import to below the read_env() call.