At the moment, QuickStack only supports containerized applications. You can either provide details about your Git repository (including a Dockerfile, which QuickStack will use to build the container image) or specify the name/URL of an already built container image from Docker Hub or a private registry. Here's a demo video on how deployments currently work using a git repo as source: https://youtu.be/koqGZ2ChHvw?t=183

I don’t know much about Nix yet, so I should go through the documentation first... Given QuickStack’s current setup with Kubernetes (using k3s), the platform is somewhat "tied" to containerized apps for now.