fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/astro/dist/runtime/server/render/index.d.ts

@@ -0,0 +1,12 @@
+export type { AstroComponentFactory, AstroComponentInstance } from './astro/index.js';
+export { createHeadAndContent, renderTemplate, renderToString } from './astro/index.js';
+export { chunkToByteArray, chunkToString, Fragment, Renderer } from './common.js';
+export { renderComponent, renderComponentToString } from './component.js';
+export { renderHTMLElement } from './dom.js';
+export { maybeRenderHead, renderHead } from './head.js';
+export type { RenderInstruction } from './instruction.js';
+export { renderPage } from './page.js';
+export { renderScript } from './script.js';
+export { type ComponentSlots, renderSlot, renderSlotToString } from './slot.js';
+export { renderScriptElement, renderUniqueStylesheet } from './tags.js';
+export { addAttribute, defineScriptVars, voidElementNames } from './util.js';