Recommendations about setting users in the container images

[jpkrohling]

          There could be some more things here, e.g. you likely need to create the user in the local environment (see https://stackoverflow.com/questions/67261873/building-docker-image-as-non-root-user)

Additionally, when using shared-volumes (e.g. docker-image as a development tool), there's a set of things you can do so that files generated use the local user, e.g. https://github.com/open-telemetry/weaver/blob/main/docs/docker-guide.md#basic-usage---otel-semconv-codegen

Finally - Many docker images that allow custom users, actually have "flags", even ENV flags, which will allow you to control the UID/GID and username in the container, e.g. if you want to line it up with the local users and shared volumes. (can't find link just now).

Originally posted by @jsuereth in #66 (comment)