Django Settings using Environment Variables via envs (https://github.com/bjinwright/envs) project.

.env

DATABASE_ENGINE=django.db.backends.sqlite3
DATABASE_NAME=db.sqlite3
DATABASE_USER=
DATABASE_PASSWORD=
DATABASE_HOST=
DATABASE_PORT=
SECRET_KEY="asdfdfadsflkjsdflkjadsflkasfakl;"
STATIC_URL=/static/
DEBUG=True

settings.py

"""
Django settings for project.

Generated by 'django-admin startproject' using Django 1.10.3.

For more information on this file, see
https://docs.djangoproject.com/en/1.10/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/1.10/ref/settings/
"""

import os

from unipath import FSPath as Path
from envs import env

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

PROJECT_PATH = Path(__file__).absolute().ancestor(1)

# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/1.10/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = env('SECRET_KEY','YourAppIsCool3423423')

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = env('DEBUG',False,var_type='boolean')

ALLOWED_HOSTS = ['.yourdomain.com','127.0.0.1','.execute-api.us-east-1.amazonaws.com']
CSRF_TRUSTED_ORIGINS = ALLOWED_HOSTS

# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.sites',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'blog'
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    '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',
]

SITE_ID = env('SITE_ID',1,var_type='integer')

LOGIN_URL = env('LOGIN_URL','/admin/login/')

ROOT_URLCONF = 'yourblog.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 = 'yourblog.wsgi.application'


# Database
# https://docs.djangoproject.com/en/1.10/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': env('DATABASE_ENGINE','django.db.backends.sqlite3'),
        'NAME': env('DATABASE_NAME',os.path.join(BASE_DIR, 'db.sqlite3')),
        'USER': env('DATABASE_USER'),
        'PASSWORD':env('DATABASE_PASSWORD'),
        'HOST':env('DATABASE_HOST'),
        'PORT':env('DATABASE_PORT')
    }
}

CACHES = {
    "default": {
        "BACKEND": "django_redis.cache.RedisCache",
        "LOCATION": "redis://{0}".format(env('REDIS_HOST','localhost:6379')),
        "OPTIONS": {
            "CLIENT_CLASS": "django_redis.client.DefaultClient"
        }
    }
}

# Password validation
# https://docs.djangoproject.com/en/1.10/ref/settings/#auth-password-validators

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',
    },
]


# Internationalization
# https://docs.djangoproject.com/en/1.10/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'America/New_York'

USE_I18N = True

USE_L10N = True

USE_TZ = True

STATIC_ROOT = PROJECT_PATH.child('static')

# Absolute path to the directory that holds media.
# Example: "/home/media/media.lawrence.com/"
MEDIA_ROOT = PROJECT_PATH.child('site_media')
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/1.10/howto/static-files/


AWS_ACCESS_KEY_ID = env('AWS_ACCESS_KEY_ID')

AWS_SECRET_ACCESS_KEY = env('AWS_SECRET_ACCESS_KEY')

AWS_STORAGE_BUCKET_NAME = env('AWS_STORAGE_BUCKET_NAME','ipoots-static')

AWS_S3_CUSTOM_DOMAIN = env('AWS_S3_CUSTOM_DOMAIN','ipoots-static.s3.amazonaws.com')

S3DIRECT_REGION = env('S3DIRECT_REGION','us-east-1')

STATICFILES_LOCATION = env('STATICFILES_LOCATION','yourblog-dev-static')
STATICFILES_STORAGE = env('STATICFILES_STORAGE','util.custom_storages.StaticStorage')

STATIC_URL = env('STATIC_URL','/yourblog-dev-static/')
MEDIAFILES_LOCATION = env('MEDIAFILES_LOCATION','yourblog-dev-media')
MEDIA_URL = env('MEDIA_URL','/yourblog-dev-media/')
DEFAULT_FILE_STORAGE = env('DEFAULT_FILE_STORAGE','util.custom_storages.MediaStorage')

S3DIRECT_DESTINATIONS = {
    'post-images': {
        'key': env('S3DIRECT_S3_KEY','{}/posts-static'.format(MEDIAFILES_LOCATION)),
        'allowed': ['image/jpeg', 'image/png', 'image/gif', 'image/webp'],
        'auth': lambda u: u.is_staff,
    },

}

AWS_HEADERS = {
    'Cache-Control': 'max-age=1800',
}

yourblog-dev.json

{
  "DEBUG":"False",
  "DATABASE_USER":"yourdbuser",
  "DATABASE_PASSWORD":"yourdbpassword",
  "DATABASE_HOST":"yourdbhost.com",
  "DATABASE_PORT":"3306",
  "DATABASE_NAME":"yourdbname",
  "DATABASE_ENGINE":"django.db.backends.mysql",
  "SECRET_KEY":"yoursecretkey",
  "AWS_ACCESS_KEY_ID":"yourawsaccesskey",
  "AWS_SECRET_ACCESS_KEY":"yourawssecretkey",
  "REDIS_HOST":"yourredishost.com:6379",
  "STATIC_URL":"/yourblog-prod-static/",
  "MEDIA_URL":"/yourblog-prod-media/",
  "STATICFILES_LOCATION":"yourblog-prod-static",
  "MEDIAFILES_LOCATION":"yourblog-prod-media"
}

nicely 👍