fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/property-information/lib/xml.js

@@ -0,0 +1,9 @@
+import {create} from './util/create.js'
+
+export const xml = create({
+  properties: {xmlBase: null, xmlLang: null, xmlSpace: null},
+  space: 'xml',
+  transform(_, property) {
+    return 'xml:' + property.slice(3).toLowerCase()
+  }
+})