docker-compose.yml

services:
  postgres: # postgres service
    container_name: postgres-sql-bsn
    image: postgres
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: postgres
      PGDATA: /var/lib/postgresql/data # where postgres data is stored
      POSTGRES_DB: book_social_network # database name
    volumes:
      - postgres:/var/lib/postgresql/data # attach volume to store data
    ports:
      - 5432:5432 # postgres port
    networks:
      - spring-demo # attach to spring-demo network
    restart: unless-stopped # restart policy

  mail-dev: # maildev service for local mail server
    container_name: mail-dev-bsn2
    image: maildev/maildev
    ports:
      - 1080:1080
      - 1025:1025
    networks:
      - spring-demo # attach to spring-demo network
    restart: unless-stopped # restart policy

# networks allow containers to communicate with each other and external services
networks:
  spring-demo:
    driver: bridge

# volumes allow data to persist even after the container is stopped
volumes:
  postgres:
    driver: local