postgresql.yml

    # All option with comment is optional, to use it, just uncomment it
    postgresql:
        container_name: postgresql
        image: postgres:alpine
        volumes:
            #  You need to create data/postgresql/pgdata folder manually or this will error
            - ./data/postgresql/pgdata:/var/lib/postgresql/data
            # Need to mound passwd to use user option
            - /etc/passwd:/etc/passwd:ro
            # If you want to create multiple database, mount this folder
            # - ./config/postgresql/init_script:/docker-entrypoint-initdb.d
        user: "${UID_GID}"
        ports:
            - "5432:5432"
        environment: 
            - POSTGRES_USER=someuser
            - POSTGRES_PASSWORD=somepassword
            # - POSTGRES_DB=default
            # If you want to create multiple database, uncomment this line
            # - POSTGRES_MULTIPLE_DATABASES=db1,db2,db3
        networks:
            - common
        restart: always