Update README

README.md

@@ -3,6 +3,20 @@
 > Dockerfiles and scripts to build various Docker images I rely on.
 
 
+## System Requirements
+ - Linux
+ - Bash
+ - Docker
+
+
+## Getting started
+The script that does the magic is called `imagebuilder.sh` in the root of this repository. Run it to get usage information:
+
+```bash
+./imagebuilder.sh
+```
+
+
 ## Docker container UID/GID map
 
 UID     | GID	| Container				| Notes