Docker Compose MySQL DB and Flyway Migrate

docker-compose.yml

version: '3'

services:
  flyway:
    image:
    entrypoint:
      dockerize -wait tcp://mydb:3306 -timeout 60s
    command:
      sh -c "
        flyway -url=jdbc:mysql://mydb:3306?characterEncoding=UTF-8 -user=root -password= migrate
        "
    depends_on:
    - db

  db:
    image: mysql:5.6
    container_name: mydb
    environment:
      - MYSQL_USER=root
      - MYSQL_ALLOW_EMPTY_PASSWORD=yes
    ports:
      - 3306:3306