docker-compose.yml

version: '3.3'

services:
    #service 1: definition of mysql database
    mysql-db:
      image: mysql:5.7
      container_name: mysql-db
      environment:
      - MYSQL_ROOT_PASSWORD=root
      - MYSQL_PASSWORD=root
      - MYSQL_DATABASE=BooksMphasis
      - MYSQL_ROOT_HOST=%

      ports:
        - "3306:3306"
      restart: always
      
    
    #service 2: definition of phpMyAdmin
    phpmyadmin:
      image: phpmyadmin/phpmyadmin:latest
      container_name: my-php-myadmin
      ports:
        - "8082:80"
      restart: always
        
      depends_on:
        - mysql-db
      environment:
       - PMA_HOST=mysql-db
    
    
    
    #service 3: definition of your spring-boot app 
    books:                        #it is just a name, which will be used only in t` image: books               #name of the image after dockerfile executes
      container_name: books-service  #name of the container created from docker image
      build: .   
      ports:
        - "8080:8080"                       #docker containter port with your os port
      restart: always
                    
      depends_on:                           #define dependencies of this app
        - mysql-db                              #dependency name (which is defined with this name 'db' in this file earlier)
      environment:
        SPRING_DATASOURCE_URL: jdbc:mysql://mysql-db:3306/BooksMphasis?createDatabaseIfNotExist=true&autoReconnect=true&useSSL=false&useUnicode=true
        SPRING_DATASOURCE_USERNAME: root
        SPRING_DATASOURCE_PASSWORD: root