- Add STATIC_ROOT and MEDIA_ROOT settings with environment variable support
- Update settings.py to use environment variables for SECRET_KEY, DEBUG, ALLOWED_HOSTS, TIME_ZONE
- Improve docker-entrypoint.sh to auto-create static/media directories
- Always run collectstatic in Docker (not just production)
- Add check_settings.py script for configuration verification
- Add PRODUCTION_CHECKLIST.md for deployment guide
- Update .env.example with all configuration options
- Update .gitignore for proper static/media file handling
This fixes the ImproperlyConfigured error when deploying with Docker.
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Co-Authored-By: Claude <noreply@anthropic.com>