Roll CI image with built-in dependencies for stprov
We're repeating the install steps in three places. 2x in stprov's CI file, and 1x in stboot's CI file.
Idea 1: install script for dependencies.
Idea 2: build CI image once.
Per the comments below, giving idea 2 a go sometime soon-ish seems like a good idea.
Edited by Rasmus Dahlberg