And if not, what would it take to make this happen, in summary?

@georgejhunt Raspbian was required in the past (as indicated by the FAQ below, unlike the README further below) but is this still true in 2020?

• http://FAQ.IIAB.IO -> "38 Captive Portal Administration: What tips & tricks exist?"
• https://github.com/holta/iiab/blob/cleanups/roles/captiveportal/README.md

Refs: #2168 #2171