That's weird the regex got lost. Thanks for the info, though. But if it's just one file I can probably restore the lost regex for you. As I recall, I hadn't changed that particular file, so just c/p from history might do the trick.
As for Influx, I have actually installed it from scratch and have a Dockerfile and init script in one of my private repos. I don't mind changing it to nspawn if you prefer or for consistency with other machines.