feat: build docker images with nix

flake.nix

@@ -17,6 +17,13 @@
       let
         pkgs = nixpkgs.legacyPackages.${system};
         yoi = pkgs.callPackage ./package.nix { };
+        dockerImages =
+          if pkgs.stdenv.isLinux then
+            import ./docker.nix {
+              inherit pkgs yoi;
+            }
+          else
+            { };
         mkApp = name: description: {
           type = "app";
           program = "${yoi}/bin/${name}";
@@ -24,8 +31,16 @@
         };
       in
       {
-        packages.default = yoi;
-        packages.yoi = yoi;
+        packages = {
+          default = yoi;
+          yoi = yoi;
+        }
+        // pkgs.lib.optionalAttrs pkgs.stdenv.isLinux {
+          docker-runtime = dockerImages.runtime;
+          docker-server = dockerImages.server;
+          docker-webui = dockerImages.webui;
+          webui-static = dockerImages.webui-static;
+        };
 
         apps.default = mkApp "yoi" "Run the Yoi terminal UI";
         apps.yoi = mkApp "yoi" "Run the Yoi terminal UI";