Update cardinal.py

Binbin Gu

2023-04-27 d6e8c17ba6eef78ddae75edd8b3dd8f69b3f0bf4

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version: '3.0'
services:
  web:
    image: python:3-alpine
    command: python3 -m http.server 8080
    volumes:
      - .:/num2words