Docker compose shared network

docker exec

docker run -e WORDPRESS_DB_HOST=127.0.0.1:3306 -e WORDPRESS_DB_USER=root -e WORDPRESS_DB_PASSWORD=password --network specific-network-name -P wordpress

https://github.com/ridi/gitlab-dind-runner
https://blog.heavycookie.co/posts/gitlab-ci-docker-compose/

docker-compose.yml

version: '3.5'
services:
  db:
    image: mysql:5.7
    restart: always
    networks:
      - default
      - specific-network-name
    hostname: database
    environment:
      MYSQL_DATABASE: 'db'
      # So you don't have to use root, but you can if you like
      MYSQL_USER: 'user'
      # You can use whatever password you like
      MYSQL_PASSWORD: 'password'
      # Password for root access
      MYSQL_ROOT_PASSWORD: 'password'
    ports:
      # <Port exposed> : < MySQL Port running inside container>
      - '3306:3306'
    expose:
      # Opens port 3306 on the container
      - '3306'
      # Where our data will be persisted
    volumes:
      - my-db:/var/lib/mysql
# Names our volume
networks:
  specific-network-name:
    external: false
    name: specific-network-name
volumes:
  my-db: