fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/css-tree/cjs/definition-syntax/index.cjs

@@ -0,0 +1,13 @@
+'use strict';
+
+const SyntaxError = require('./SyntaxError.cjs');
+const generate = require('./generate.cjs');
+const parse = require('./parse.cjs');
+const walk = require('./walk.cjs');
+
+
+
+exports.SyntaxError = SyntaxError.SyntaxError;
+exports.generate = generate.generate;
+exports.parse = parse.parse;
+exports.walk = walk.walk;