version: '3.8'

services:
    db:
        image: postgres:13
        environment:
            POSTGRES_DB: ${DB_NAME}
            POSTGRES_USER: ${DB_USER}
            POSTGRES_PASSWORD: ${DB_PASSWORD}
        volumes:
            - postgres_data:/var/lib/postgresql/data
        ports:
            - "${DB_PORT}:5432"

volumes:
    postgres_data: