Fix environment variable handling for production deployment

- Update settings.py to support both ALLOWED_HOSTS and DJANGO_ALLOWED_HOSTS
- Add production CSRF_TRUSTED_ORIGINS for vhtv-stiftung.de
- Update env-template.txt with production variable examples
- Improve compatibility between development and production environments

docs/production-server-setup.md

@@ -79,14 +79,20 @@ Add these settings (replace with your actual values):
 DJANGO_DEBUG=0
 DJANGO_SECRET_KEY=your-very-long-secret-key-here
 DJANGO_ALLOWED_HOSTS=your-domain.com,your-server-ip
+LANGUAGE_CODE=de
+TIME_ZONE=Europe/Berlin
 
 # Database Settings
 POSTGRES_DB=stiftung_prod
 POSTGRES_USER=stiftung_user
 POSTGRES_PASSWORD=your-secure-database-password
+DB_HOST=db
+DB_PORT=5432
 
 # Redis Settings  
 REDIS_URL=redis://redis:6379/0
+CELERY_BROKER_URL=redis://redis:6379/0
+CELERY_RESULT_BACKEND=redis://redis:6379/0
 
 # Email Settings (optional)
 EMAIL_HOST=smtp.your-provider.com
@@ -94,6 +100,21 @@ EMAIL_PORT=587
 EMAIL_HOST_USER=your-email@example.com
 EMAIL_HOST_PASSWORD=your-email-password
 EMAIL_USE_TLS=1
+
+# Paperless-ngx Integration (if you're using Paperless)
+# PAPERLESS_API_URL=http://your-paperless-server:port
+# PAPERLESS_API_TOKEN=your-paperless-api-token
+# PAPERLESS_REQUIRED_TAG=Your_Required_Tag
+# PAPERLESS_LAND_TAG=Your_Land_Tag
+# PAPERLESS_ADMIN_TAG=Your_Admin_Tag
+# PAPERLESS_DESTINATAERE_TAG_ID=123
+# PAPERLESS_LAND_TAG_ID=456
+# PAPERLESS_ADMIN_TAG_ID=789
+
+# Gramps Integration (if you're using GrampsWeb)
+# GRAMPS_URL=http://your-gramps-server:port
+# GRAMPS_USERNAME=your-gramps-username
+# GRAMPS_PASSWORD=your-gramps-password
 ```
 
 ## Step 7: Set Up Production Docker Compose