gistfile1.txt

version: '3'
services:
    mysqldb:
        image: mysql
        container_name: ${MYSQL_HOST}
        restart: always
        env_file:
            - ".env" 
            #.env is the file for configuration which include 
            #MYSQL_HOST=mysql
            #MYSQL_DATABASE=test
            #MYSQL_ROOT_USER=root
            #MYSQL_ROOT_PASSWORD=root
            #MYSQL_USER=dev
            #MYSQL_PASSWORD=dev
            
        environment:
            - MYSQL_DATABASE=${MYSQL_DATABASE}
            - MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD}
            - MYSQL_USER=${MYSQL_USER}
            - MYSQL_PASSWORD=${MYSQL_PASSWORD}
        ports:
            - "8989:3306"
        volumes:
            - "./data/db/mysql:/var/lib/mysql"