The OliveTin container image does not use the PUID and PGID convention to specify which user the container should run as - this is a convention that was popularized by linuxserver.io, because their container images use supervisord. Instead, simply use the
--user argument when defining the container, to change the user OliveTin runs as.
An example is shown below;
user@host: docker create --name olivetin -p 1337:1337 -v /etc/OliveTin/:/config:ro docker.io/jamesread/olivetin --user container:container user@host: docker start olivetin