docker compose postgres and pgadmin

docker-compose.yml

version: '3'
services:
  pg:
    image: postgres
    ports:
      - "5432:5432"
    environment: 
      - POSTGRES_USER=root
      - POSTGRES_PASSWORD=root
    volumes:
      - //C/docker-volume/pg:/var/lib/postgresql/data
      
  pgadmin:
    image: "dpage/pgadmin4"
    ports:
      - "5480:80"
      - "5443:443"
    environment:
      - [email protected]
      - PGADMIN_DEFAULT_PASSWORD=root
    volumes: 
      - //C/docker-volume/pgadmin:/var/lib/pgadmin
    depends_on:
      - pg

similar: https://github.com/khezen/compose-postgres