docker postgres service

.env

DB_USER=postgres
DB_PASSWORD=postgres
DB_NAME=postgres

DATABASE_URL="postgres://${DB_USER}:${DB_PASSWORD}@localhost:5432/${DB_NAME}"

docker-compose.yml

version: "3"

services:
  db:
    image: postgres:15.2-alpine
    environment:
      - POSTGRES_USER=${DB_USER}
      - POSTGRES_PASSWORD=${DB_PASSWORD}
      - POSTGRES_DB=${DB_NAME}
    ports:
      - "5432:5432"
    volumes:
      - postgres:/var/lib/postgresql/data

volumes:
  postgres: