Does Docker actually compete with Nix? It seems that Docker is more concerned with containment and Nix with packages. I would love to be able to use Nix to de

Does Docker actually compete with Nix? It seems that Docker is more concerned with containment and Nix with packages. I would love to be able to use Nix to define my project+dependencies and Docker to run it. I'd be surprised if someone hasn't already made a baseline NixOS docker image to build off of.