aae8588182
It is now possible to pass a `fromImage` to `buildLayeredImage` and `streamLayeredImage`, similar to what `buildImage` currently supports. This will prepend the layers of the given base image to the resulting image, while ensuring that at most `maxLayers` are used. It will also ensure that environment variables from the base image are propagated to the final image.
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at https://nixos.org/nixos and in the manual in doc/manual.