services:
  db:
    image: mysql:latest
    environment:
      MYSQL_DATABASE: exemple
      MYSQL_USER: exemple
      MYSQL_PASSWORD: exemple
      MYSQL_ROOT_PASSWORD: root
    ports:
      - 127.0.0.1:3306:3306

app:
  build: ./app
  depends_on:
    - db
  environment:
    DB_HOST: db 
    DB_USER: exemple
    DB_PASSWORD: exemple
    DB_NAME: exemple
  command: ["./wait-for-it.sh", "db:3306", "--", "node", "index.js"] # Also change here
  volumes:
    - ./app:/usr/src/app
  ports:
    - 127.0.0.1:3000:3000