add initial solution (made with copilot)

bootstrap.php

@@ -0,0 +1,50 @@
+<?php
+// bootstrap.php
+// Posizione consigliata: project_root/bootstrap.php
+
+require_once __DIR__ . '/vendor/autoload.php';
+
+use Core\Container;
+use Core\Config;
+use Core\RateLimiter\RateLimiterInterface;
+use Core\RateLimiter\FileRateLimiter;
+use Core\RateLimiter\InMemoryRateLimiter;
+use Psr\Log\LoggerInterface;
+use Core\LoggerFactory;
+use Services\ExternalApiService;
+
+$container = new Container();
+
+// Rate limiter driver configurabile via config or env: 'file' or 'memory'
+$rlDriver = Config::get('rate_limiter_driver', 'file');
+
+if ($rlDriver === 'memory') {
+    $container->singleton(RateLimiterInterface::class, function($c) {
+        $requests = (int) \Core\Config::get('rate_limit_requests', 100);
+        $window = (int) \Core\Config::get('rate_limit_window_seconds', 60);
+        return new InMemoryRateLimiter($requests, $window);
+    });
+} else {
+    $container->singleton(RateLimiterInterface::class, function($c) {
+        $dir = Config::get('rate_limit_storage_dir', sys_get_temp_dir() . '/api_rate_limit');
+        return new FileRateLimiter($dir);
+    });
+}
+
+// Logger binding as PSR LoggerInterface
+$container->singleton(LoggerInterface::class, function($c) {
+    // LoggerFactory::create returns a Monolog\Logger instance
+    return LoggerFactory::create(Config::get('log_ident', 'api'));
+});
+
+// External API service binding
+$container->singleton(ExternalApiService::class, function($c) {
+    return new ExternalApiService();
+});
+
+// If you have other services, bind them here, for example:
+// $container->singleton(SomeService::class, function($c) {
+//     return new SomeService($c->make(LoggerInterface::class), ...);
+// });
+
+return $container;