Add user notes to README
diff --git a/README.md b/README.md
index 74bf096..3b83099 100644
--- a/README.md
+++ b/README.md
@@ -23,3 +23,6 @@
 
 Anytime you checkin a file, the site is regenerated:
 https://ci.apache.org/builders/fundraising-site
+
+## User notes
+Users must be [set up on gitbox](https://gitbox.apache.org/setup/)