add link to rake tasks documentation

diff --git a/gitlab-rake.sh b/gitlab-rake.sh
index 7bc7dc20c435188b17be83366128ca5c1e01c756..d5f61ffd4562a815281c38dac6dc7fc284efb4ab 100755 (executable)
--- a/gitlab-rake.sh
+++ b/gitlab-rake.sh
@@ -1,4 +1,8 @@
 #!/bin/sh
+# Frontend to Gitlab Rake tasks
+#
+# http://docs.gitlab.com/ce/raketasks/
+#
 set -e
 
 # Unset ENV variables that might interfere with