version: "3.4"
services:
    postgres:
        container_name: postgres
        image: postgres:13.4
        restart: unless-stopped
        ports:
            - <host-ip-address>:5432:5432
        volumes:
            - pgdata:/var/lib/postgresql/data
        environment:
            POSTGRES_USER: <user>
            POSTGRES_PASSWORD: <password>

volumes:
    pgdata: