Django deployment checklist and production settings

                  import os
from .base import *

DEBUG = False

SECRET_KEY = os.environ['SECRET_KEY']

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

# Security settings
SECURE_SSL_REDIRECT = True
SESSION_COOKIE_SECURE = True
CSRF_COOKIE_SECURE = True
SECURE_BROWSER_XSS_FILTER = True
SECURE_CONTENT_TYPE_NOSNIFF = True
X_FRAME_OPTIONS = 'DENY'
SECURE_HSTS_SECONDS = 31536000
SECURE_HSTS_INCLUDE_SUBDOMAINS = True
SECURE_HSTS_PRELOAD = True

# Database
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': os.environ['DB_NAME'],
        'USER': os.environ['DB_USER'],
        'PASSWORD': os.environ['DB_PASSWORD'],
        'HOST': os.environ['DB_HOST'],
        'PORT': os.environ.get('DB_PORT', '5432'),
        'CONN_MAX_AGE': 600,
        'OPTIONS': {
            'sslmode': 'require',
        },
    }
}

# Static files
STATIC_ROOT = os.path.join(BASE_DIR, 'staticfiles')
STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage'

# Media files
DEFAULT_FILE_STORAGE = 'storages.backends.s3boto3.S3Boto3Storage'
AWS_ACCESS_KEY_ID = os.environ['AWS_ACCESS_KEY_ID']
AWS_SECRET_ACCESS_KEY = os.environ['AWS_SECRET_ACCESS_KEY']
AWS_STORAGE_BUCKET_NAME = os.environ['AWS_STORAGE_BUCKET_NAME']

# Cache
CACHES = {
    'default': {
        'BACKEND': 'django_redis.cache.RedisCache',
        'LOCATION': os.environ['REDIS_URL'],
    }
}

# Email
EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
EMAIL_HOST = os.environ['EMAIL_HOST']
EMAIL_PORT = int(os.environ.get('EMAIL_PORT', 587))
EMAIL_USE_TLS = True
EMAIL_HOST_USER = os.environ['EMAIL_USER']
EMAIL_HOST_PASSWORD = os.environ['EMAIL_PASSWORD']

# Logging
LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'handlers': {
        'file': {
            'level': 'ERROR',
            'class': 'logging.handlers.RotatingFileHandler',
            'filename': '/var/log/django/error.log',
            'maxBytes': 1024 * 1024 * 10,  # 10 MB
            'backupCount': 5,
        },
    },
    'loggers': {
        'django': {
            'handlers': ['file'],
            'level': 'ERROR',
            'propagate': True,
        },
    },
}