docker-compose.yml

services:
  mysqldb: # this name can be anything
    image: mysql:8.0 # this name has to match docker hub image:tag
    ports:
      - "3306:3306" # host_port:container_port
    environment:
      - MYSQL_ROOT_PASSWORD=root123
      - MYSQL_DATABASE=sbm
    volumes:
      - mysql-data:/var/lib/mysql                 # change to ./mysql-data:/var/lib/mysql to store data inside the project dir
    healthcheck:
      test: ["CMD", "mysqladmin", "ping", "-h", "localhost"]
      interval: 1m30s
      timeout: 30s
      retries: 5
      start_period: 30s
    networks:
      - springboot-db-net

  application:
    build: .
    depends_on:
      mysqldb:
        condition: service_healthy
    ports:
      - "8080:8080" # host_port:container_port
    networks:
      - springboot-db-net

networks:
  springboot-db-net:

# run docker volume create mysql-data prior to managed data inside external named volume.
volumes:
  mysql-data:
    external: true