streamline building, proper makefile help

README.md

@@ -8,8 +8,10 @@ First start:
   - modify your user ID number as USR
   - EXPOSE to port exposed outside
 
-- start with docker-compose
-- data/ and home/ folders appear
+- start with docker-compose, or by using `make`
+- data/ folder appears. It contains users definitions, and home folders
 - create user by adding authorized_keys contents to data/users/[UID]-[username] file
   - example:  `vim users/2000-user1`  <- copy id_rsa.pub contents there
+- use UID >=2000
+- you can also use the `user-add` script