chore: redirect debug logs to file for docker env

@@ -185,15 +185,20 @@ class AuthService
     /**
      * 获取微信手机号
      */
+    private function logDebug($msg)
+    {
+        file_put_contents(__DIR__ . '/debug.log', "[" . date('Y-m-d H:i:s') . "] " . $msg . "\n", FILE_APPEND);
+    }
+
     private function getPhoneNumber($phoneCode)
     {
         $appId = $this->config['wechat']['app_id'];
         $appSecret = $this->config['wechat']['app_secret'];
 
-        echo "Debug: Checking WeChat Config - AppID: {$appId}, SecretLen: " . strlen($appSecret) . "\n";
+        $this->logDebug("Checking WeChat Config - AppID: {$appId}, SecretLen: " . strlen($appSecret));
 
         if (empty($appId) || empty($appSecret)) {
-            echo "Debug: AppID or Secret is empty!\n";
+            $this->logDebug("AppID or Secret is empty!");
             return null; // 开发模式不支持
         }
 
@@ -205,11 +210,11 @@ class AuthService
         ]);
 
         $tokenRaw = file_get_contents($tokenUrl);
-        echo "Debug: Access Token Raw Response: {$tokenRaw}\n";
+        $this->logDebug("Access Token Raw Response: {$tokenRaw}");
 
         $tokenRes = json_decode($tokenRaw, true);
         if (empty($tokenRes['access_token'])) {
-            echo "Debug: Failed to get access token.\n";
+            $this->logDebug("Failed to get access token.");
             return null;
         }
 
@@ -223,7 +228,7 @@ class AuthService
             ]
         ]));
 
-        echo "Debug: Phone Number Raw Response: {$phoneRaw}\n";
+        $this->logDebug("Phone Number Raw Response: {$phoneRaw}");
 
         $phoneRes = json_decode($phoneRaw, true);
 
@@ -231,7 +236,7 @@ class AuthService
             return $phoneRes['phone_info']['purePhoneNumber'];
         }
 
-        echo "Debug: Failed to parse phone number from response.\n";
+        $this->logDebug("Failed to parse phone number from response.");
         return null;
     }
 

@@ -77,9 +77,11 @@ $ws_worker->onWorkerStart = function ($worker) use ($config) {
     $ws_port = $config['server']['websocket_port'];
     echo "Relay Server Started on {$ws_host}:{$ws_port}\n";
 
-    // Debug: Check WeChat Config
+    // Debug: Check WeChat Config (Log to file for Docker)
     $appId = $config['wechat']['app_id'] ?? 'Not Set';
-    echo "Loaded WeChat AppID: {$appId}\n";
+    $logMsg = "[" . date('Y-m-d H:i:s') . "] Startup - Loaded WeChat AppID: {$appId}\n";
+    file_put_contents(__DIR__ . '/debug.log', $logMsg, FILE_APPEND);
+    echo $logMsg; // Keep echo just in case
 
     // Heartbeat check
     $check_interval = $config['heartbeat']['check_interval'];