fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/unstorage/drivers/null.mjs

@@ -0,0 +1,35 @@
+import { defineDriver } from "./utils/index.mjs";
+const DRIVER_NAME = "null";
+export default defineDriver(() => {
+  return {
+    name: DRIVER_NAME,
+    hasItem() {
+      return false;
+    },
+    getItem() {
+      return null;
+    },
+    getItemRaw() {
+      return null;
+    },
+    getItems() {
+      return [];
+    },
+    getMeta() {
+      return null;
+    },
+    getKeys() {
+      return [];
+    },
+    setItem() {
+    },
+    setItemRaw() {
+    },
+    setItems() {
+    },
+    removeItem() {
+    },
+    clear() {
+    }
+  };
+});