Add Docker support and fix external access issues

🐳 Docker Configuration:
- Created Dockerfile for containerized API deployment
- Added docker-compose.api.yml for complete stack
- Added requirements.txt for Docker builds
- Added .dockerignore for optimized builds
- Configured external access on 0.0.0.0:8080

📚 Documentation Updates:
- Updated quickstart to reflect Neo4j already running
- Added Docker deployment tabs with external access info
- Updated REST API docs with Docker deployment options
- Clarified local vs external access deployment methods

🔧 Configuration:
- API_HOST=0.0.0.0 for external access in Docker
- Health checks and restart policies
- Proper networking and volume configuration
- Environment variable configuration

✅ Addresses user issues:
- REST API now accessible from outside the machine via Docker
- Documentation reflects actual infrastructure state
- Clear deployment options for different use cases

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

requirements.txt

@@ -0,0 +1,17 @@
+# Core API dependencies
+fastapi>=0.104.0
+uvicorn[standard]>=0.24.0
+pydantic>=2.5.0
+
+# Mem0 dependencies
+mem0ai>=0.1.115
+posthog>=3.5.0
+qdrant-client>=1.9.1
+sqlalchemy>=2.0.31
+vecs>=0.4.0
+ollama>=0.1.0
+
+# Additional utilities
+requests
+httpx
+python-dateutil