优化：增加Office进程关闭日志

server/src/main/java/cn/keking/service/OfficePluginManager.java

@@ -21,11 +21,8 @@ import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
-import java.time.Duration;
-import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
-import java.util.List;
 import java.util.Map;
 import java.util.Properties;
 
@@ -143,6 +140,7 @@ public class OfficePluginManager {
     @PreDestroy
     public void destroyOfficeManager(){
         if (null != officeManager && officeManager.isRunning()) {
+            logger.info("Shutting down office process");
             officeManager.stop();
         }
     }