Reduce 0 and 1 working, todo reduce 5.

README.md

@@ -14,7 +14,9 @@ $ git submodule update
 ### Database (2 containers)
 Set db admin, user, pass, etc in 'Makefile'.  
 Spin up the database service and create users:  
+Make sure you create a folder for the data on host machine (see `mongodb-stack.yml` `volumes`.  
 ```bash
+$ mkdir -p ${HOME}/mongo_container/data/  # default one
 # $ make database-clean  # opt, removes docker services, not data
 $ make database-service
 $ make database-users  # only first time; user data persists too