Added ignore docs when export [skip ci]

vuongxuongminh · vuongxuongminh · commit cfd9243c0f3e · 2019-07-05T18:32:29.000+07:00
diff --git a/.gitattributes b/.gitattributes
@@ -9,4 +9,5 @@
 /.scrutinizer.yml   export-ignore
 /.styleci.yml   export-ignore
 /tests              export-ignore
+/docs              export-ignore
 /.editorconfig      export-ignore
