Add Docker Compose support for simplified deployment

- Add docker-compose.yaml with service configuration
- Support for multiple transport options (TCP, Serial, BLE)
- Configure standard port mapping (8000:8000)
- Use named volume for portable data persistence
- Update Dockerfile to use npm install for better compatibility

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Dockerfile

@@ -4,7 +4,7 @@ FROM node:20-slim AS frontend-builder
 WORKDIR /build
 
 COPY frontend/package*.json ./
-RUN npm ci
+RUN npm install
 
 COPY frontend/ ./
 RUN npm run build