fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/astro/dist/assets/fonts/sync.js

@@ -0,0 +1,17 @@
+import { FONTS_TYPES_FILE } from "./constants.js";
+function syncFonts(settings) {
+  if (!settings.config.experimental.fonts) {
+    return;
+  }
+  settings.injectedTypes.push({
+    filename: FONTS_TYPES_FILE,
+    content: `declare module 'astro:assets' {
+	/** @internal */
+	export type CssVariable = (${JSON.stringify(settings.config.experimental.fonts.map((family) => family.cssVariable))})[number];
+}
+`
+  });
+}
+export {
+  syncFonts
+};