Sometimes you have a problem that you should absolutely have seen coming. The annual "the company's Sitecore license has expired" fun is very much one of those things. But I'd not thought about this in advance, and the license expired while I was on holiday this year. It caused my team a load of hassle... But I have a plan to avoid this pain in the future:
I was asked to enable Sitecore's ItemService endpoints on a containerised instance of Sitecore recently, and my first pass through this didn't work. Turns out there's a key bit of documentation that seems to be missing for this scenario. Hence a quick post to help get info into Google. So if you need to do this, read on: