add CI images to repo

pkgs/nix-with-node/default.nix

@@ -0,0 +1,38 @@
+{ pkgs, ... }:
+pkgs.dockerTools.buildLayeredImage {
+  name = "nix-with-node";
+  contents = with pkgs; [
+    ./root
+    bashInteractive
+    cacert
+    coreutils
+    git
+    gnutar
+    gzip
+    jq
+    nix
+    nodejs
+    openssh
+    shadow
+    xz
+  ];
+
+  config = {
+    Cmd = [ "/bin/bash" ];
+    WorkingDir = "/home/nixbld";
+    Env = [
+      "ENV=/etc/profile.d/nix.sh"
+      "NIX_BUILD_SHELL=/bin/bash"
+      "PATH=/usr/bin:/bin"
+      "SSL_CERT_FILE=${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt"
+      "USER=root"
+    ];
+  };
+
+  fakeRootCommands = ''
+    ${pkgs.dockerTools.shadowSetup}
+    groupadd -r nixbld
+    useradd -r -g nixbld nixbld
+  '';
+  enableFakechroot = true;
+}