improve sentence

README.md

@@ -52,7 +52,7 @@ Running all specs:
 
 ### Docker (Compose)
 
-There is a working Docker Compose config file, which allows you to spin up both
+There is a working Docker Compose config file, which define a number of services including
 an app server for Rails as well as a local 389ds (LDAP) server.
 
 For Rails developers, you probably just want to start the LDAP server: `docker-compose up ldap`,