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# docker-compose.yml
version: '3.3'

services:
  postgres:
    image: postgres:13
    environment:
     - POSTGRES_DB=my_db
     - POSTGRES_USER=root
     - POSTGRES_PASSWORD=123456
    ports:
      - '5432:5432'
    volumes:
      - ./postgres_data:/var/lib/postgresql/data

  pgadmin: 👈 add pgadmin
    image: dpage/pgadmin4
    environment:
     - PGADMIN_DEFAULT_EMAIL=root@admin.com
     - PGADMIN_DEFAULT_PASSWORD=root
    ports:
      - "5050:80"

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docker ps
docker inspect ID

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CREATE TABLE tasks (
	id serial PRIMARY KEY,
	title VARCHAR ( 255 ) NOT NULL,
	completed boolean DEFAULT false
);