Step 3: Settings মডুলারাইজেশন

import environ
from pathlib import Path

# BASE_DIR
BASE_DIR = Path(__file__).resolve().parent.parent.parent

# environ শুরু
env = environ.Env(DEBUG=(bool, False))
environ.Env.read_env(BASE_DIR / ".env")

# SECRET_KEY এবং DEBUG
SECRET_KEY = env("SECRET_KEY")
DEBUG = env("DEBUG")
ALLOWED_HOSTS = env.list("ALLOWED_HOSTS")

# অ্যাপ্লিকেশন
INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'rest_framework',
    'corsheaders',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'corsheaders.middleware.CorsMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

ROOT_URLCONF = 'config.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [BASE_DIR / 'templates'],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'config.wsgi.application'

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': BASE_DIR / env('DATABASE_NAME', default='db.sqlite3'),
    }
}

STATIC_URL = '/static/'
STATICFILES_DIRS = [BASE_DIR / 'static']
STATIC_ROOT = BASE_DIR / 'staticfiles'
MEDIA_URL = '/media/'
MEDIA_ROOT = BASE_DIR / 'media'

# CORS
CORS_ALLOWED_ORIGINS = [
    "http://localhost:3000",
]

from .base import *
DEBUG = True

from .base import *
DEBUG = False

from .development import *