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>

docs/quickstart.mdx

@@ -16,16 +16,28 @@ description: 'Get your Mem0 Memory System running in under 5 minutes'
 
 ## Installation
 
-### Step 1: Start Database Services
+### Step 1: Verify Database Services
 
-```bash
-docker compose up -d neo4j
-```
+Both required database services are already running:
 
 <Note>
-Supabase is already running as part of your existing infrastructure on the localai network.
+**Neo4j** is already running in Docker container `mem0-neo4j` on ports 7474 (HTTP) and 7687 (Bolt).
+**Supabase** is already running as part of your existing infrastructure on the localai network.
 </Note>
 
+You can verify the services are running:
+
+```bash
+# Check running containers
+docker ps | grep -E "(neo4j|supabase)"
+
+# Test Neo4j connection
+curl http://localhost:7474
+
+# Test Supabase connection  
+curl http://localhost:8000/health
+```
+
 ### Step 2: Test Your Installation
 
 ```bash
@@ -36,13 +48,36 @@ You should see all systems passing.
 
 ### Step 3: Start the REST API Server ✅
 
-Our Phase 2 implementation provides a production-ready REST API:
+Our Phase 2 implementation provides a production-ready REST API with two deployment options:
 
-```bash
-python start_api.py
-```
+<Tabs>
+  <Tab title="Direct Python (Local Only)">
+    For local development and testing:
 
-The server will start on **http://localhost:8080** with:
+    ```bash
+    python start_api.py
+    ```
+
+    **Access:** http://localhost:8080 (localhost only)
+  </Tab>
+  
+  <Tab title="Docker (External Access) ✅ Recommended">
+    For external access and production deployment:
+
+    ```bash
+    # Build and start the API server
+    docker-compose -f docker-compose.api.yml up -d
+    ```
+
+    **Access:** http://YOUR_SERVER_IP:8080 (accessible from outside)
+    
+    <Note>
+    The Docker deployment automatically configures the API to accept external connections on `0.0.0.0:8080`.
+    </Note>
+  </Tab>
+</Tabs>
+
+Both options provide:
 - Interactive documentation at `/docs`
 - Full authentication and rate limiting
 - Comprehensive error handling