Erro instalação via docker windows

1

Boa tarde estou fazendo uma instalação nova através do docker e está ocorrendo este erro durante a instalação

    C:\i-educar>docker-compose exec php composer new-install
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Nothing to install or update
Package jakub-onderka/php-console-color is abandoned, you should avoid using it. Use php-parallel-lint/php-console-color instead.
Package jakub-onderka/php-console-highlighter is abandoned, you should avoid using it. Use php-parallel-lint/php-console-highlighter instead.
Package moontoast/math is abandoned, you should avoid using it. Use brick/math instead.
Generating optimized autoload files
> Illuminate\Foundation\ComposerScripts::postAutoloadDump
> @php artisan package:discover --ansi

   Doctrine\DBAL\Driver\PDOException  : SQLSTATE[08006] [7] could not translate host name "postgres" to address: Name or service not known

  at /var/www/ieducar/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:31
    27|             parent::__construct($dsn, (string) $user, (string) $password, (array) $options);
    28|             $this->setAttribute(PDO::ATTR_STATEMENT_CLASS, [PDOStatement::class, []]);
    29|             $this->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    30|         } catch (\PDOException $exception) {
  > 31|             throw new PDOException($exception);
    32|         }
    33|     }
    34|
    35|     /**

  Exception trace:

  1   Illuminate\Foundation\Application::Illuminate\Foundation\{closure}(Object(App\Providers\AppServiceProvider))
      [internal]:0

  2   PDOException::("SQLSTATE[08006] [7] could not translate host name "postgres" to address: Name or service not known")
      /var/www/ieducar/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:27

  Please use the argument -v to see more details.
Script @php artisan package:discover --ansi handling the post-autoload-dump event returned with error code 1
Script @composer install handling the new-install event returned with error code 1

utilizo windows 10, estou tentando instalar a versao do ieducar 2.3 e seguindo o tutorial de instalação