ci: test docker regestry

flake.nix

@@ -1,17 +1,31 @@
 {
-  description = "A simple Nix flake for testing Gitea Actions";
+  description = "A simple Nix flake for testing Gitea Actions Docker build";
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
   };
 
-  outputs = { self, nixpkgs }:
+  outputs = { nixpkgs, ... }:
     let
       system = "x86_64-linux";
       pkgs = nixpkgs.legacyPackages.${system};
     in
     {
+      # Обычный пакет
       packages.${system}.default = pkgs.hello;
+
+      # Docker образ
+      packages.${system}.dockerImage = pkgs.dockerTools.buildImage {
+        name = "test-nix-hello";
+        tag = "latest";
+        copyToRoot = pkgs.buildEnv {
+          name = "image-root";
+          paths = [ pkgs.hello pkgs.coreutils ];
+          pathsToLink = [ "/bin" ];
+        };
+        config = {
+          Cmd = [ "/bin/hello" ];
+        };
+      };
     };
 }
-