fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/rehype/index.d.ts

@@ -0,0 +1,11 @@
+/// <reference types="rehype-parse" />
+/// <reference types="rehype-stringify" />
+
+import type {Root} from 'hast'
+import type {Processor} from 'unified'
+
+/**
+ * Create a new unified processor that already uses `rehype-parse` and
+ * `rehype-stringify`.
+ */
+export const rehype: Processor<Root, undefined, undefined, Root, string>