refactor: 修复潜在bug、补全许可声明、添加类型注解、同步文档

OfficialWebsite/index.html

@@ -535,7 +535,7 @@
             <p style="margin-bottom:6px;">方式二：手动复制</p>
             <pre>mkdir -p /opt/minecraft/sentinel
 cp main.rb method_executor.rb server_status_detector.rb \
-   systemd_notifier.rb config.rb \
+   systemd_notifier.rb config.rb updates.rb \
    /opt/minecraft/sentinel/</pre>
 
             <h3>3. 手动测试</h3>