How to connect a container created later to an existing network

What you want to do

reference

Create

Create a network called net1


docker create network net1

Connection

docker-compose.yml


version: "3"
services:

  potmum:
    image: tukiyo3/potmum:20170807
    restart: always
    volumes:
     - /etc/localtime:/etc/localtime
     - ./db/production.sqlite3:/srv/potmum/db/production.sqlite3
     - ./attachment_files/:/srv/potmum/public/attachment_files/
    environment:
      PRIVATE_MODE: 0
      USE_ATTACHMENT_FILE: 1
      COLOR_THEME: "green"
      #
      USE_GITHUB: 0
      USE_DEVELOPER: 1

networks:
  default:
    external:
      name: net1

docker-compose.yml


version: "3"
services:

  nginx:
    image: nginx:alpine
    restart: always
    volumes:
      - ./nginx/htpasswd:/etc/nginx/htpasswd
      - ./nginx/default.conf:/etc/nginx/conf.d/default.conf
    ports:
      - 80:80

networks:
  default:
    external:
      name: net1

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