fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/css-tree/lib/syntax/atrule/index.js

@@ -0,0 +1,23 @@
+import container from './container.js';
+import fontFace from './font-face.js';
+import importAtrule from './import.js';
+import layer from './layer.js';
+import media from './media.js';
+import nest from './nest.js';
+import page from './page.js';
+import scope from './scope.js';
+import startingStyle from './starting-style.js';
+import supports from './supports.js';
+
+export default {
+    container,
+    'font-face': fontFace,
+    import: importAtrule,
+    layer,
+    media,
+    nest,
+    page,
+    scope,
+    'starting-style': startingStyle,
+    supports
+};