add connect button for ws html5 (#621)

zhaomingwork

2023-06-12 d7e3ae17c3ac056752ecf5c41ff9a96645fcad49

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