Hi @dersaei! Welcome to the community 
For production usage I’d most definitely still rely on Postgres and Redis. The simplified version you’ve copied here is just for quick local testing and evaluation purposes. It’s the quickest way from 0 to having a Directus instance you can experiment with.
Outside of Redis + Postgres, I’d also highly recommend running multiple containers of Directus itself for scaling and high availability using something like Kubernetes or a platform-as-a-service provider.
I’ll make note on my end to update that doc so it’s clearer that that’s just a quick getting started and not a full production example 