Assuming you have Docker and Portainer installed, the env vars aren't too difficult. Not every value is required by every user, and the basic values you'd need to provide are the same ones you'd need to know in order to be able to develop a script.
You can get a working OliveTin installation up-an-running, by knowing the answers to only a few questions:
What URL do you use to access the CDVR WebUI?
What is the path to your CDVR recordings?
What is the path to your CDVR executables?
What is your timezone in standard linux format?
Where would you like to store your persistent OliveTin data (needs to be a writable path)?
What local domain name is used on your LAN? localdomain or something else?
Answer those 6 questions, and I'll post a set of env vars here, and you can be up-and-running with OliveTin in a few minutes. Project One-Click and a few other things won't work immediately, but you can add those values later.
EDIT: Don't get discouraged by the occasional user that has needed extra hand-holding to get OliveTin going. There have been something like 25K downloads of the project -- so most need little or no assistance.