docker con postgres y pgadmin4

docker-compose.yml

version: "3.7"
services:
  db:
    image: postgres:12.2
    restart: always
    environment:
      POSTGRES_DB: postgres
      POSTGRES_USER: admin
      POSTGRES_PASSWORD: secret
      PGDATA: /var/lib/postgresql/data
    volumes:
      - db-data:/var/lib/postgresql/data
    ports:
      - "5432:5432" 
  pgadmin:
    image: dpage/pgadmin4:6.2
    restart: always
    environment:
      PGADMIN_DEFAULT_EMAIL: [email protected]
      PGADMIN_DEFAULT_PASSWORD: secret
      PGADMIN_LISTEN_PORT: 80
    ports:
      - "5000:80"
    volumes:
      - pgadmin-data:/var/lib/pgadmin
    links:
      - "db:pgsql-server"

volumes:
  db-data:
  pgadmin-data:

notes

Install docker

$ sudo apt-get install docker.io docker-compose

$ sudo groupadd docker
$ sudo usermod -aG docker $USER
$ sudo reboot

command to start

docker-compose up