diff --git a/Dockerfile b/Dockerfile
index e1c80cd..593bcb0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -34,4 +34,4 @@ RUN apk add --no-cache nginx php8 php8-fpm php8-iconv php8-pcntl
 COPY --from=asset /asset/ /
 EXPOSE 1688/tcp 1689/tcp
 WORKDIR /kms-server/
-CMD ["php", "main.php"]
+ENTRYPOINT ["php", "main.php"]
diff --git a/main.php b/main.php
index fe2230d..6932346 100644
--- a/main.php
+++ b/main.php
@@ -6,6 +6,10 @@ require_once './src/Daemon.php';
 require_once './src/Logger.php';
 require_once './src/Process.php';
 
+if (in_array('--debug', $argv)) { // debug mode
+    logging::$logLevel = logging::DEBUG;
+}
+
 $nginx = array(
     'name' => 'nginx',
     'command' => ['/usr/sbin/nginx'],
diff --git a/src/Logger.php b/src/Logger.php
index 1129ca4..62f782c 100644
--- a/src/Logger.php
+++ b/src/Logger.php
@@ -1,6 +1,6 @@
 <?php
 
-logging::$logLevel = logging::DEBUG;
+logging::$logLevel = logging::INFO; // default log level
 
 $logColor = array(
     logging::DEBUG    => '37m', // white