fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/css-tree/cjs/syntax/node/Operator.cjs

@@ -0,0 +1,28 @@
+'use strict';
+
+// '/' | '*' | ',' | ':' | '+' | '-'
+const name = 'Operator';
+const structure = {
+    value: String
+};
+
+function parse() {
+    const start = this.tokenStart;
+
+    this.next();
+
+    return {
+        type: 'Operator',
+        loc: this.getLocation(start, this.tokenStart),
+        value: this.substrToCursor(start)
+    };
+}
+
+function generate(node) {
+    this.tokenize(node.value);
+}
+
+exports.generate = generate;
+exports.name = name;
+exports.parse = parse;
+exports.structure = structure;