importare database mysql dentro un contenitore (docker)

[belk123]

importare database mysql dentro un contenitore (docker)

$ cat docker-compose.yml
version: '2'
services:
  app:
    build:
      context: .
    image: test-image
    ports:
      - 8080:80
    volumes:
      - .:/srv/app
    links:
      - mysql
      - redis
    environment:
      DB_HOST: mysql
      DB_DATABASE: laravel_docker
      DB_USERNAME: app
      DB_PASSWORD: password
      REDIS_HOST: redis
      SESSION_DRIVER: redis
      CACHE_DRIVER: redis
  mysql:
    image: mysql:5.7
    ports:
      - 13306:3306
    environment:
      MYSQL_DATABASE: test
      MYSQL_USER: root
      MYSQL_PASSWORD: root1
      MYSQL_ROOT_PASSWORD: root2
  redis:
    image: redis:4.0-alpine
    ports:
      - 16379:6379

$ cat Dockerfile
FROM php:7.2.2-cli

COPY . /usr/local/bin
WORKDIR /usr/local/bin
RUN docker-php-ext-install mbstring pdo pdo_mysql

CMD mysql -u $MYSQL_USER -p $MYSQL_PASSWORD $MYSQL_DATABASE < test.sql

$ cat test.php
<?php

$pdo = new pdo(
    "mysql:host=localhost;dbname=test",
    'root','root1'
);

$query = $pdo->query("SELECT * FROM people");
var_dump($pdo->errorInfo());

foreach($query as $row ){  
    var_dump($row);  
}  

$ cat test.sh
#!/usr/bin/env bash
set -e
cd $(dirname "$0")

docker-compose up --build -d
docker run test-image php /usr/local/bin/test.php

$ ./test.sh
Building app
Step 1/5 : FROM php:7.2.2-cli
 ---> 21c3582549e6
Step 2/5 : COPY . /usr/local/bin
 ---> Using cache
 ---> e0a9005e2907
Step 3/5 : WORKDIR /usr/local/bin
 ---> Using cache
 ---> 3efd6cdfab46
Step 4/5 : RUN docker-php-ext-install mbstring pdo pdo_mysql
 ---> Using cache
 ---> 282ab8fb5896
Step 5/5 : CMD mysql -u $MYSQL_USER -p $MYSQL_PASSWORD $MYSQL_DATABASE < test.sql
 ---> Using cache
 ---> 7ba640bd690d
Successfully built 7ba640bd690d
dockermysql_redis_1 is up-to-date
dockermysql_mysql_1 is up-to-date
Starting dockermysql_app_1

Fatal error: Uncaught PDOException: SQLSTATE[HY000] [2002] No such file or directory in /usr/local/bin/test.php:5

Perchè non funziona?