Add controller node installation guide

Signed-off-by: Lance Chen <cyen0312@gmail.com>
Add compute node installation guide

Signed-off-by: Lance Chen <cyen0312@gmail.com>
Fix NCTU openstack url

Signed-off-by: Lance Chen <cyen0312@gmail.com>
Update general setup

Signed-off-by: Lance Chen <cyen0312@gmail.com>