AdditionalConfiguration with Redis Cache and ENV variables

AdditionalConfiguration.php

<?php

use TYPO3\CMS\Core\Utility\ArrayUtility;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Core\Core\Bootstrap;

// For docker we log to syslog
$GLOBALS['TYPO3_CONF_VARS']['LOG']['writerConfiguration'] = [
    \TYPO3\CMS\Core\Log\LogLevel::WARNING => [
        \TYPO3\CMS\Core\Log\Writer\SyslogWriter::class => []
    ]
];

$bootstrap = Bootstrap::getInstance();


// Use Redis cache
ArrayUtility::mergeRecursiveWithOverrule($GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations'], [
    'cache_pages' => [
        'backend' => \TYPO3\CMS\Core\Cache\Backend\RedisBackend::class,
        'options' => [
            'hostname' => 'redis',
            'defaultLifetime' => 86400,
            'database' => 0
        ]
    ],
    'cache_pagesection' => [
        'backend' => \TYPO3\CMS\Core\Cache\Backend\RedisBackend::class,
        'options' => [
            'hostname' => 'redis',
            'defaultLifetime' => 86400,
            'database' => 1
        ]
    ],
    'cache_hash' => [
        'backend' => \TYPO3\CMS\Core\Cache\Backend\RedisBackend::class,
        'options' => [
            'hostname' => 'redis',
            'defaultLifetime' => 86400,
            'database' => 2
        ]
    ],
    'extbase_object' => [
        'backend' => \TYPO3\CMS\Core\Cache\Backend\RedisBackend::class,
        'options' => [
            'hostname' => 'redis',
            'defaultLifetime' => 86400,
            'database' => 3
        ]
    ],
    'extbase_reflection' => [
        'backend' => \TYPO3\CMS\Core\Cache\Backend\RedisBackend::class,
        'options' => [
            'hostname' => 'redis',
            'defaultLifetime' => 86400,
            'database' => 4
        ]
    ]
]);

if ($bootstrap->getApplicationContext()->isDevelopment()) {
    $GLOBALS['TYPO3_CONF_VARS']['BE']['debug'] = TRUE;
	$GLOBALS['TYPO3_CONF_VARS']['FE']['debug'] = TRUE;
	$GLOBALS['TYPO3_CONF_VARS']['BE']['installToolPassword'] = md5('local');
	$GLOBALS['TYPO3_CONF_VARS']['SYS']['devIPmask'] = '*';
	$GLOBALS['TYPO3_CONF_VARS']['SYS']['trustedHostsPattern'] = '.*';
	$GLOBALS['TYPO3_CONF_VARS']['SYS']['enableDeprecationLog'] = 'file';
	$GLOBALS['TYPO3_CONF_VARS']['SYS']['sqlDebug'] = 1;
	$GLOBALS['TYPO3_CONF_VARS']['SYS']['clearCacheSystem'] = TRUE;
	$GLOBALS['TYPO3_CONF_VARS']['SYS']['displayErrors'] = 1;
	$GLOBALS['TYPO3_CONF_VARS']['SYS']['systemLogLevel'] = 0;
	$GLOBALS['TYPO3_CONF_VARS']['SYS']['exceptionalErrors'] = '28674';
	$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['l10n']['backend'] = 'TYPO3\\CMS\\Core\\Cache\\Backend\\NullBackend';
}

/**
 * Configurations that can be set by Docker environment variables
 */
if (getenv('MYSQL_USER')) {
    $GLOBALS['TYPO3_CONF_VARS']['DB']['username'] = getenv('MYSQL_USER');
}
if (getenv('MYSQL_PASSWORD')) {
    $GLOBALS['TYPO3_CONF_VARS']['DB']['password'] = getenv('MYSQL_PASSWORD');
}
if (getenv('MYSQL_DB')) {
    $GLOBALS['TYPO3_CONF_VARS']['DB']['database'] = getenv('MYSQL_DB');
}
if (getenv('MYSQL_SERVICENAME')) {
    $GLOBALS['MYSQL_SERVICENAME']['DB']['host'] = getenv('MYSQL_SERVICENAME');
}
if (getenv('MYSQL_PORT')) {
    $GLOBALS['MYSQL_PORT']['DB']['port'] = getenv('MYSQL_PORT');
}
if (getenv('TRUSTED_HOSTS')) {
    $GLOBALS['TYPO3_CONF_VARS']['SYS']['trustedHostsPattern'] = getenv('TRUSTED_HOSTS');
}
if (getenv('USE_MAILHOG')) {
    $GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport'] = 'smtp';
    $GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport_smtp_server'] = 'mail:1025';
}
if (getenv('SENTRY_DSN')) {
    $sentryConfig = unserialize($GLOBALS['TYPO3_CONF_VARS']['EXT']['extConf']['sentry_client']);
    $sentryConfig['dsn'] = getenv('SENTRY_DSN');
    $GLOBALS['TYPO3_CONF_VARS']['EXT']['extConf']['sentry_client'] = serialize($sentryConfig);
}

/**
 * !!! IMPORTANT !!!
 *
 * To enable your local configuration add
 * one or more files in conf.d as they are
 * loaded automatically.
 */
$configurationFiles = GeneralUtility::getFilesInDir(GeneralUtility::getFileAbsFileName('typo3conf/conf.d/'), 'php', TRUE);
foreach ($configurationFiles as $file) {
    require_once($file);
}