Add Docker networking support for N8N and container integration

- Added docker-compose.api-localai.yml for Docker network integration
- Updated config.py to support dynamic Supabase connection strings via environment variables
- Enhanced documentation with Docker network deployment instructions
- Added specific N8N workflow integration guidance
- Solved Docker networking issues for container-to-container communication

Key improvements:
* Container-to-container API access for N8N workflows
* Automatic service dependency resolution (Ollama, Supabase)
* Comprehensive deployment options for different use cases
* Production-ready Docker network configuration

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

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

docs/quickstart.mdx

@@ -75,9 +75,28 @@ Our Phase 2 implementation provides a production-ready REST API with two deploym
     The Docker deployment automatically configures the API to accept external connections on `0.0.0.0:8080`.
     </Note>
   </Tab>
+  
+  <Tab title="Docker Network Integration ✅ For N8N/Containers">
+    For integration with N8N or other Docker containers on custom networks:
+
+    ```bash
+    # Deploy to localai network (or your custom network)
+    docker-compose -f docker-compose.api-localai.yml up -d
+    
+    # Find container IP for connections
+    docker inspect mem0-api-localai --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}'
+    ```
+
+    **Access:** http://CONTAINER_IP:8080 (from within Docker network)
+    **Example:** http://172.21.0.17:8080
+    
+    <Note>
+    Perfect for N8N workflows and Docker-to-Docker communication. Automatically handles service dependencies like Ollama and Supabase connections.
+    </Note>
+  </Tab>
 </Tabs>
 
-Both options provide:
+All deployment options provide:
 - Interactive documentation at `/docs`
 - Full authentication and rate limiting
 - Comprehensive error handling