Symfony Doctrine Bundle PHP configuration

doctrine.php

<?php

namespace Symfony\Component\DependencyInjection\Loader\Configurator;

use Symfony\Config\DoctrineConfig;
use Symfony\Config\FrameworkConfig;

return static function (DoctrineConfig $doctrine, ContainerConfigurator $container, FrameworkConfig $framework): void {
    $dbal = $doctrine->dbal();
    $dbal->defaultConnection('default');

    $orm = $doctrine->orm();
    $orm->defaultEntityManager('default');
    $orm->autoGenerateProxyClasses(true);

    $connection = $dbal->connection('default');
    $connection->url(env('DATABASE_URL')->resolve());

    $entityManager = $orm->entityManager('default');
    $entityManager->autoMapping(true)
        ->namingStrategy('doctrine.orm.naming_strategy.underscore_number_aware')
    ;
    $entityManager->mapping('App')
        ->isBundle(false)
        ->dir(param('kernel.project_dir') . '/src/Entity')
        ->prefix('App\Entity')
        ->alias('App')
    ;

    if ('test' === $container->env()) {
        $connection->dbnameSuffix('_test' . env('TEST_TOKEN')->default(''));
    }

    if ('prod' === $container->env()) {
        $orm->autoGenerateProxyClasses(false);
        $entityManager->queryCacheDriver()
            ->type('pool')
            ->pool('doctrine.system_cache_pool')
        ;
        $entityManager->resultCacheDriver()
            ->type('pool')
            ->pool('doctrine.result_cache_pool')
        ;

        $cache = $framework->cache();
        $cache->pool('doctrine.result_cache_pool')
            ->adapters('cache.app')
        ;
        $cache->pool('doctrine.system_cache_pool')
            ->adapters('cache.system')
        ;
    }
};