fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/astro/dist/vite-plugin-integrations-container/index.d.ts

@@ -0,0 +1,8 @@
+import type { Plugin as VitePlugin } from 'vite';
+import type { Logger } from '../core/logger/core.js';
+import type { AstroSettings } from '../types/astro.js';
+/** Connect Astro integrations into Vite, as needed. */
+export default function astroIntegrationsContainerPlugin({ settings, logger, }: {
+    settings: AstroSettings;
+    logger: Logger;
+}): VitePlugin;