update

docs/CHANGELOG.md

@@ -134,3 +134,43 @@ Root:
 - [ ] API rate limiting
 - [ ] Caching layer (Redis)
 - [ ] Message queue for crawler (Celery)
+
+
+---
+
+## Recent Updates (November 2025)
+
+### Security Improvements
+- **MongoDB Internal-Only**: Removed port exposure, only accessible via Docker network
+- **Ollama Internal-Only**: Removed port exposure, only accessible via Docker network
+- **Reduced Attack Surface**: Only Backend API (port 5001) exposed to host
+- **Network Isolation**: All services communicate via internal Docker network
+
+### Ollama Integration
+- **Docker Compose Integration**: Ollama service runs alongside other services
+- **Automatic Model Download**: phi3:latest model downloaded on first startup
+- **GPU Support**: NVIDIA GPU acceleration with automatic detection
+- **Helper Scripts**: `start-with-gpu.sh`, `check-gpu.sh`, `configure-ollama.sh`
+- **Performance**: 5-10x faster with GPU acceleration
+
+### API Enhancements
+- **Send Newsletter Endpoint**: `/api/admin/send-newsletter` to send to all active subscribers
+- **Subscriber Status Fix**: Fixed stats endpoint to correctly count active subscribers
+- **Better Error Handling**: Improved error messages and validation
+
+### Documentation
+- **Consolidated Documentation**: Moved all docs to `docs/` directory
+- **Security Guide**: Comprehensive security documentation
+- **GPU Setup Guide**: Detailed GPU acceleration setup
+- **MongoDB Connection Guide**: Connection configuration explained
+- **Subscriber Status Guide**: How subscriber status system works
+
+### Configuration
+- **MongoDB URI**: Updated to use Docker service name (`mongodb` instead of `localhost`)
+- **Ollama URL**: Configured for internal Docker network (`http://ollama:11434`)
+- **Single .env File**: All configuration in `backend/.env`
+
+### Testing
+- **Connectivity Tests**: `test-mongodb-connectivity.sh`
+- **Ollama Tests**: `test-ollama-setup.sh`
+- **Newsletter API Tests**: `test-newsletter-api.sh`