Add LDAP service and seed task

README.md

@@ -50,6 +50,13 @@ back-end:
 
     docker-compose exec ldap dsconf localhost backend create --suffix="dc=kosmos,dc=org" --be-name="dev"
 
+Now you can seed the back-end with data using this Rails task:
+
+    bundle exec rails ldap:seed
+
+The seeds task will first delete any existing entries in the directory tree
+("dc=kosmos,dc=org"), and then create our example/development entries.
+
 ## Documentation
 
 * [Ruby on Rails](https://guides.rubyonrails.org/)