Change test server .gitignore

test-server/.gitignore

@@ -2,9 +2,7 @@ uploads/*
 public/*
 !public/github.png
 !public/github2.jpg
-!public/22mb-dummy
-!public/1mb-dummy
-!public/chunk-dummy
+!public/*-dummy
 !public/beethoven.mp3
 !public/cat-fu.mp4
 !uploads/readme

test-server/public/utf8-dummy

@@ -0,0 +1 @@
+中文!檔案\u00測試 ABCDE 測試