docker-compose.yml

version: '2.3'
services:
  postgresql:
    image: postgres:9.5.12
    environment:
      POSTGRES_PASSWORD: ""
    ports:
      - "5432:5432"
    healthcheck:
      test: pg_isready -U postgres
      start_period: 10s
      interval: 10s
      timeout: 30s
      retries: 3
  mysql:
    image: mysql:5.7
    environment:
      MYSQL_ALLOW_EMPTY_PASSWORD: "yes"
    ports:
      - "3306:3306"
    healthcheck:
      test: mysqladmin -h 127.0.0.1 -uroot ping
      start_period: 15s
      interval: 10s
      timeout: 30s
      retries: 3
  healthcheck:
    image: busybox
    depends_on:
      postgresql:
        condition: service_healthy
      mysql:
        condition: service_healthy