Hi Martin,
Yes, I replaced the outdated instructions with a link to the docker instance for development, which should just work and shouldn't take long to set up. It should be good enough for a single user instance, unless I misunderstood what you mean by that. I'd recommend this, as I plan on supporting this dev environment.
The old instructions of course remain in the Git history, but on balance I felt they were doing more harm than good (they sound like an easy to follow recipe, but it isn't actually that easy and some problems aren't so easy to notice). There are less dated instructions here, by Erin Buchanan:
https://www.aggieerin.com/post/formr-installation-instructions/But they are also not entirely up-to-date, e.g. I don't think you can install opencpu-cache like this anymore. More importantly, I believe additional security measures are necessary.
Best,
Ruben