qucik fix for npe

service/src/main/java/com/telephoners/krakyournet/ctf/beans/tasks/TextTask.java

@@ -7,6 +7,7 @@ import org.mongodb.morphia.annotations.Entity;
 
 import javax.ws.rs.container.ContainerRequestContext;
 import java.io.IOException;
+import java.util.HashMap;
 import java.util.List;
 
 @Entity("tasks")
@@ -28,7 +29,7 @@ public class TextTask extends Task
     @Override
     public TaskResponse getTaskResponse(TaskRequestContext taskRequestContext) throws IOException
     {
-        return new TaskResponse(text, null);
+        return new TaskResponse(text, new HashMap<>());
     }
 
     public void setText(String text)