多个 docker-compose 共享网络，共享卷

server/docker-compose1.yml

version: '3'

networks:
  web-network:

volumes:
  www-data:

services:
  docker-nginx:
    image: nginx:1.21.3
    hostname: nginx
    ports:
      - "81:80"
    restart: always
    tty: true
    volumes:
      - www-data:/var/www/html
    networks:
      - web-network

server/docker-compose2.yml

version: '3'

# 外部网络
networks:
  server_web-network:
    external: true

# 外部卷 https://stackoverflow.com/questions/54051130/share-volumes-between-separate-docker-compose-files
volumes:
  server_www-data:
    external: true

services:
  docker-nginx2:
    image: nginx:1.21.3
    hostname: nginx2
    ports:
      - "82:80"
    restart: always
    tty: true
    volumes:
      - server_www-data:/var/www/html
    networks:
      - server_web-network