How do you use pkgs.dockerTools to express a multi-stage build process similar to a Dockerfile?

I have been trying to find an example of pkgs.dockerTools.pullImage, pkgs.dockerTools.buildImage, and pkgs.dockerTools.buildLayeredImage that does the equivalent of this very simple dockerfile: FROM caddy:2.11-builder AS builder RUN xcaddy build \ --with github.com/caddy-dns/namesilo \ --with github.com/liujed/caddy-dns01proxy FROM caddy:2.11 COPY --from=builder /usr/bin/caddy /usr/bin/caddy So far, I’ve found the following threads and posts on the topic: pkgs.dockerTools Examples C...