fix: Add nixpacks configuration for Astro deployment

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

@@ -0,0 +1,28 @@
+import { Ident, Delim } from '../../tokenizer/index.js';
+
+const FULLSTOP = 0x002E; // U+002E FULL STOP (.)
+
+export const name = 'Layer';
+export const structure = {
+    name: String
+};
+
+export function parse() {
+    let tokenStart = this.tokenStart;
+    let name = this.consume(Ident);
+
+    while (this.isDelim(FULLSTOP)) {
+        this.eat(Delim);
+        name += '.' + this.consume(Ident);
+    }
+
+    return {
+        type: 'Layer',
+        loc: this.getLocation(tokenStart, this.tokenStart),
+        name
+    };
+}
+
+export function generate(node) {
+    this.tokenize(node.name);
+}