Work on development environment.

README.md

 # waraps
 
+- [Prepare Existing ROS Computer](doc/prepare_ros_computer.md)
 - [Install Software on Local Machine or Virtual Machine](doc/install.md)
 - [Local ROS Installation and LRS Docker Modules](doc/local_ros_installation.md)
-- Build a Development Docker
+- [Minimal Dockers](doc/minimal_dockers.md)
 
 ## Missing
 
 - information about how to login in docker registry
 - Maybe an overview of the idea here
 
+The above should be put in lrs_portal with pointers to documents here.
+