fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/css-tree/lib/syntax/node/Number.js

@@ -0,0 +1,18 @@
+import { Number as NumberToken } from '../../tokenizer/index.js';
+
+export const name = 'Number';
+export const structure = {
+    value: String
+};
+
+export function parse() {
+    return {
+        type: 'Number',
+        loc: this.getLocation(this.tokenStart, this.tokenEnd),
+        value: this.consume(NumberToken)
+    };
+}
+
+export function generate(node) {
+    this.token(NumberToken, node.value);
+}