No problem. Yep your comment sums it up well. Although Kubernetes does allow you to horizontally scale decently well with any tech stack. I've run a few Flask

No problem. Yep your comment sums it up well. Although Kubernetes does allow you to horizontally scale decently well with any tech stack. I've run a few Flask + Celery apps (replace that with Rails + Sidekiq or whatever your preferred stack is) on Kubernetes and it's working out quite nicely. Zero downtime deploys (and even node upgrades) with a deployment model that makes sense for individuals and large teams (gitops philosophy using well supported tools like Argo CD, etc.). For things that don't need that scale, a single server with Docker Compose does the trick. I've been doing that for about 8 years now with Docker and Ansible. ~20 lines of YAML configuration to get a machine from ground zero to fully up and running, secured and serving any Dockerized app of your choosing over a custom domain with SSL with automated DB backups, monitoring, logging, etc..