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>

docker-compose.api.yml

@@ -0,0 +1,53 @@
+version: '3.8'
+
+services:
+  mem0-api:
+    build: .
+    container_name: mem0-api-server
+    ports:
+      - "8080:8080"
+    environment:
+      - API_HOST=0.0.0.0
+      - API_PORT=8080
+      - API_KEYS=mem0_dev_key_123456789,mem0_docker_key_987654321
+      - ADMIN_API_KEYS=mem0_admin_key_111222333
+      - RATE_LIMIT_REQUESTS=100
+      - RATE_LIMIT_WINDOW_MINUTES=1
+    networks:
+      - mem0-network
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8080/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+    depends_on:
+      - neo4j
+    volumes:
+      - ./logs:/app/logs:rw
+
+  neo4j:
+    image: neo4j:5.23
+    container_name: mem0-neo4j-api
+    ports:
+      - "7474:7474"
+      - "7687:7687"
+    environment:
+      - NEO4J_AUTH=neo4j/password123
+      - NEO4J_PLUGINS=["apoc"]
+      - NEO4J_dbms_security_procedures_unrestricted=apoc.*
+    volumes:
+      - neo4j_data:/data
+      - neo4j_logs:/logs
+    networks:
+      - mem0-network
+    restart: unless-stopped
+
+networks:
+  mem0-network:
+    driver: bridge
+    external: false
+
+volumes:
+  neo4j_data:
+  neo4j_logs: