Add continuous integration practices/scripts

[henchc]

I think it could be overwhelming for most, but an appendix detailing the CI could be nice for those interested.

[choldgraf]

Definitely agree - I nibbled at the margins of this in the tech infrastructure section, but agree we should lay out a path forward for people if they wanna go that route. It may not be necessary for many courses that aren't as large though

[henchc]

ya this is relatively low priority, but thought i'd make an issue for the future :)