Ignore macOS files

DS_Store sucks :(
Change-Id: Iba321e75c15714d8fe478befec56db77cc9a851d
diff --git a/.gitignore b/.gitignore
index 45ddf0a..0efad7b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 site/
+.DS_Store
\ No newline at end of file