Implement .env configuration

mcp/http-server.php

@@ -3,10 +3,14 @@
 declare(strict_types=1);
 
 require_once __DIR__ . '/../src/VoipMsClient.php';
+require_once __DIR__ . '/../src/EnvLoader.php';
 
+use VoipMs\EnvLoader;
 use VoipMs\VoipMsClient;
 use VoipMs\VoipMsResponse;
 
+EnvLoader::load(__DIR__ . '/../.env');
+
 const MCP_PROTOCOL_VERSION = '2025-06-18';
 const MCP_SESSION_ID = 'voipms-test-session';
 
@@ -229,7 +233,7 @@ function callTool(string $name, array $arguments): array
         'voipms_get_recent_cdr' => responsePayload($client->getCdr(
             requiredStringArg($arguments, 'date_from'),
             requiredStringArg($arguments, 'date_to'),
-            stringArg($arguments, 'timezone', getenv('VOIPMS_TIMEZONE') ?: '-4'),
+            stringArg($arguments, 'timezone', getenv('VOIPMS_TIMEZONE') ?: getenv('DEFAULT_TIMEZONE') ?: '-4'),
             cdrFilters($arguments),
         )),
         'voipms_add_number_to_phonebook_group' => addNumberToPhonebookGroupTool($client, $arguments),