$validator = new Validation();

    $validator->add(
        'email',
        new EmailValidator([
        'message' => 'Invalid email given'
    ]));
    $validator->add(
        'email',
        new UniquenessValidator([
        'message' => 'Sorry, The email was registered by another user'
    ]));
    $validator->add(
        'username',
        new UniquenessValidator([
        'message' => 'Sorry, That username is already taken'
    ]));
    // until this point there is no problem but after return side
    return $this->validate($validator);
}`

version: '2'
services:
################################################################
  db:
    image: mysql:latest
    container_name: mysql
    expose:
      - 3306
    ports:
      - "3307:3306"
    volumes:
      - ./docker/mysql:/var/lib/mysql
    environment:
      MYSQL_DATABASE: invo
      MYSQL_USER: test
      MYSQL_PASSWORD: test123
      MYSQL_ROOT_PASSWORD: admin123
################################################################
  app:
    build: ./docker/php/
    container_name: php
    tty: true
    # ports:
    #   - "6900:6900"
    volumes:
      - ./docker/nginxlog:/var/log/nginx
      - ./invo:/var/www/html
################################################################
  web:
    tty: true
    image: linxlad/nginx
    container_name: nginx
    ports:
      - "80:80"
    volumes:
      - ./docker/nginx:/etc/nginx/conf.d
      - ./docker/nginx/selfconf/nginx.conf:/etc/nginx/nginx.conf
      - ./docker/nginxlog:/var/log/nginx
      - ./invo:/var/www/html
    links:
      - app
    depends_on:
      - app