add timezone to the about page (in demo build and local server)

_debug_replacements.php

@@ -57,7 +57,7 @@ return [
 
 	'vers_fw' => $vers,
 	'date' => date('Y-m-d'),
-	'time' => date('G:i'),
+	'time' => date('G:i')." ".TIMEZONE,
 	'vers_httpd' => '0.4',
 	'vers_sdk' => '010502',
 	'githubrepo' => 'https://github.com/espterm/espterm-firmware',

base.php

@@ -14,6 +14,8 @@ if (!empty($argv[1])) {
 
 define('GIT_HASH', trim(shell_exec('git rev-parse --short HEAD')));
 
+define('TIMEZONE', trim(shell_exec('date +%Z'))); // for replacements
+
 $prod = defined('STDIN');
 define('DEBUG', !$prod);