Lemmy Support

I'm trying to deploy my own instance following install with docker but seems it's not up to date. Or am I missing something?

Not sure if it's relevant, the version of the files to download is 0.17 instead of 0.17.3 as the latest release in the github repo.
Also, I'm guessing I'd need to download the rest of the files listed in the prod folder, not just the two in the documentation
https://github.com/LemmyNet/lemmy/tree/0.17.3/docker/prod

Also, I'm trying to use Caddy, I'm guessing I should replace nginx in the docker-compose.yml, correct?
Or can I use the Caddy service of the host machine instead of a new docker container?