Update README.md

Author: jeffmaki

README.md

@@ -20,12 +20,11 @@
 # To build images
 
 ```git clone --recursive https://github.com/TaskarCenterAtUW/workspaces-stack.git```
-
 ```docker-compose -f docker-compose.build.yml --env-file XXX.env build```
+```docker-compose -f docker-compose.build.yml --env-file XXX.env push```
 
 Replace XXX.env with the environment definition file of the environment for which you want to build an image. This can be overridden when running (see below). 
 
-
 # To update docker daemon to run with latest images
 
 ```docker-compose -f docker-compose.deploy.yml --env-file XXX.env up -d -pull always --force-recreate --remove-orphans```