RegBrowser/regbrowser/settings.py

import os
from pathlib import Path

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

SECRET_KEY = os.environ.get('SECRET_KEY', 'django-insecure-regbrowser-dev-key-change-in-production')

DEBUG = os.environ.get('DEBUG', 'False').lower() in ('1', 'true', 'yes')

ALLOWED_HOSTS = os.environ.get('ALLOWED_HOSTS', '*').split(',')

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'whitenoise.runserver_nostatic',
    'explorer',
]

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

ROOT_URLCONF = 'regbrowser.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        '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 = 'regbrowser.wsgi.application'

if os.environ.get('POSTGRES_HOST'):
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.postgresql',
            'NAME': os.environ.get('POSTGRES_DB', 'regbrowser'),
            'USER': os.environ.get('POSTGRES_USER'),
            'PASSWORD': os.environ.get('POSTGRES_PASSWORD'),
            'HOST': os.environ['POSTGRES_HOST'],
            'PORT': os.environ.get('POSTGRES_PORT', '5432'),
        }
    }
else:
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.sqlite3',
            'NAME': os.environ.get('SQLITE_PATH', BASE_DIR / 'db.sqlite3'),
        }
    }

AUTH_PASSWORD_VALIDATORS = [
    {'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator'},
    {'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator'},
    {'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator'},
    {'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator'},
]

LANGUAGE_CODE = 'es'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_TZ = True

STATIC_URL = 'static/'
STATIC_ROOT = os.environ.get('STATIC_ROOT', BASE_DIR / 'staticfiles')
STORAGES = {
    'default': {'BACKEND': 'django.core.files.storage.FileSystemStorage'},
    'staticfiles': {
        'BACKEND': (
            'whitenoise.storage.CompressedManifestStaticFilesStorage'
            if not DEBUG
            else 'django.contrib.staticfiles.storage.StaticFilesStorage'
        )
    },
}
DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

LOGIN_URL = '/login/'
LOGIN_REDIRECT_URL = '/'