diff --git a/.gitignore b/.gitignore
index 14ca1f8..8fce603 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1 @@
-Onlinejudge*/
-log/
+data/
diff --git a/data/backend/avatar/default.png b/data/backend/avatar/default.png
deleted file mode 100644
index 97f3495..0000000
Binary files a/data/backend/avatar/default.png and /dev/null differ