README.md in config_skeleton-2.2.1 vs README.md in config_skeleton-2.3.0

- old
+ new

@@ -22,9 +22,12 @@
 presumably know what to do already.
 
 # Usage
 
+A single execution of configuration generation can be performed by specifying
+the `SERVICE_NAME_CONFIG_ONESHOT=true` environment variable.
+
 All of the documentation is provided in the [ConfigSkeleton class](https://rubydoc.info/gems/config_skeleton/ConfigSkeleton).
 
 # Contributing