version: '2.3'
services:
    postgres1:
        image: postgres
        restart: always
        environment:
            POSTGRES_PASSWORD: mysecretpassword
        ports:
            - 5432:5432
        networks:
            default:
                aliases:
                    - postgre-sql.local
    postgres2:
        image: postgres
        restart: always
        environment:
            POSTGRES_PASSWORD: mysecretpassword
        ports:
            - 5441:5432