migrated all languages to devshell

modules/dev/docker.nix

@@ -4,13 +4,37 @@
   pkgs,
   ...
 }:
+let
+  packages = builtins.attrValues {
+    inherit (pkgs) dockfmt; # Format Dockerfiles
+    inherit (pkgs.nodePackages)
+      dockerfile-language-server-nodejs # LSP for Dockerfiles
+      ;
+  };
+in
 {
-  options.my.dev.docker.enable = lib.mkEnableOption "enable";
-  config = lib.mkIf config.my.dev.docker.enable {
-    environment.variables.DOCKER_CONFIG = "\${XDG_CONFIG_HOME}/docker";
-    users.users.jawz.packages = builtins.attrValues {
-      inherit (pkgs) dockfmt;
-      inherit (pkgs.nodePackages) dockerfile-language-server-nodejs;
+  options = {
+    my.dev.docker.enable = lib.mkEnableOption "Install Docker tooling globally";
+    devShells.docker = lib.mkOption {
+      type = lib.types.package;
+      default = pkgs.mkShell {
+        inherit packages;
+        name = "docker-dev-shell";
+        shellHook = ''
+          echo "🐳 Docker dev environment"
+        '';
+      };
+      description = "Docker and Dockerfile tooling shell";
     };
   };
+  config = lib.mkMerge [
+    (lib.mkIf config.my.dev.docker.enable {
+      users.users.jawz = {
+        inherit packages;
+      };
+    })
+    {
+      environment.variables.DOCKER_CONFIG = "\${XDG_CONFIG_HOME}/docker";
+    }
+  ];
 }