# Backend environment (example – never commit real secrets) DJANGO_SECRET_KEY=django-insecure-change-me-in-production DJANGO_DEBUG=True DB_NAME=cloud_reader DB_USER=postgres DB_PASSWORD=postgres DB_HOST=localhost DB_PORT=5432 # Open Library metadata enrichment (optional) OPENLIBRARY_ENABLED=true OPENLIBRARY_PREFERRED_LANG=es OPENLIBRARY_FALLBACK_LANG=en OPENLIBRARY_TIMEOUT_SECONDS=10 OPENLIBRARY_CONNECT_TIMEOUT_SECONDS=15 OPENLIBRARY_USER_AGENT=CloudReader/1.0