diff --git a/bin/setup b/bin/setup
index 68a3b32e2b..c9274099d6 100755
--- a/bin/setup
+++ b/bin/setup
@@ -1,4 +1,10 @@
 #!/usr/bin/env ruby
+#
+# Install dependencies and migrate data during production deployments or
+# when updating your development environment.
+#
+# Take care when changing it and consider the ofn-install repository for
+# the context of deployments.
 require "fileutils"
 
 # path to your application root.