Update readme

README.md

@@ -14,6 +14,8 @@ composer create-project lakedrops/d8-project [DIRNAME] --stability dev --no-inte
 
 This will build the full structure and create a git repository which you can then use during the full live-cycle of that project.
 
+To install a new site with the included default configuration, use `drush site-install config_installer` and you get a jump-start from that.
+
 ## Deploy project to upstream stages
 
 For deployment, both initially and for later updates, follow this: