improve redis support in settings.local.php

idea to improve https://gitlab.lakedrops.com/composer/plugin/drupal-environment/-/blob/master/templates/settings.local.php.twig

if (file_exists('modules/contrib/redis/redis.info.yml') && extension_loaded('redis')) {
  // Set Redis as the default backend for any cache bin not otherwise specified.
  $settings['redis.connection']['interface'] = 'PhpRedis';
  $settings['cache']['default'] = 'cache.backend.redis';

  // Allow the services to work before the Redis module itself is enabled.
  $settings['container_yamls'][] = 'modules/contrib/redis/redis.services.yml';

  // Manually add the classloader path, this is required for the container
  // cache bin definition below and allows to use it without the redis module
  // being enabled.
  $class_loader->addPsr4('Drupal\\redis\\', 'modules/contrib/redis/src');

  // Use redis for container cache.
  // The container cache is used to load the container definition itself, and
  // thus any configuration stored in the container itself is not available
  // yet. These lines force the container cache to use Redis rather than the
  // default SQL cache.
  $settings['bootstrap_container_definition'] = [
    'parameters' => [],
    'services' => [
      'redis.factory' => [
        'class' => 'Drupal\redis\ClientFactory',
      ],
      'cache.backend.redis' => [
        'class' => 'Drupal\redis\Cache\CacheBackendFactory',
        'arguments' => [
          '@redis.factory',
          '@cache_tags_provider.container',
          '@serialization.phpserialize',
        ],
      ],
      'cache.container' => [
        'class' => '\Drupal\redis\Cache\PhpRedis',
        'factory' => ['@cache.backend.redis', 'get'],
        'arguments' => ['container'],
      ],
      'cache_tags_provider.container' => [
        'class' => 'Drupal\redis\Cache\RedisCacheTagsChecksum',
        'arguments' => ['@redis.factory'],
      ],
      'serialization.phpserialize' => [
        'class' => 'Drupal\Component\Serialization\PhpSerialize',
      ],
    ],
  ];

  // Set a fixed prefix so that all requests share the same prefix, even if
  // on different domains.
  $settings['cache_prefix'] = getenv('MYSQL_DATABASE') . '_';
}

The last part may not be relevant if there are different redis-containers by project.