Adjust WorkerPool bootstrap setup for Docker

The WorkerPool bootstrap setup has been modified to accommodate a Docker environment. Now, the script uses 'docker/preload.php' as the bootstrap in Docker environment, and falls back to 'vendor/autoload.php' if the Docker file does not exist. This adjustment helps to maintain a flexible setup that can suit different runtime contexts.

csv-blueprint.php

@@ -20,12 +20,17 @@
 
 \define('PATH_ROOT', __DIR__);
 require_once PATH_ROOT . '/vendor/autoload.php';
-WorkerPool::setBootstrap(PATH_ROOT . '/vendor/autoload.php');
 
 if ('cli' !== \PHP_SAPI) {
     throw new Exception('This script must be run from the command line.');
 }
 
+WorkerPool::setBootstrap(
+    \file_exists(PATH_ROOT . '/docker/preload.php')
+        ? PATH_ROOT . '/docker/preload.php'
+        : PATH_ROOT . '/vendor/autoload.php',
+);
+
 // Fix for GitHub actions. See action.yml
 $_SERVER['argv'] = Utils::fixArgv($_SERVER['argv'] ?? []);
 $_SERVER['argc'] = \count($_SERVER['argv']);