fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/@astrojs/markdown-remark/dist/index.d.ts

@@ -0,0 +1,14 @@
+import type { AstroMarkdownOptions, AstroMarkdownProcessorOptions, MarkdownProcessor, SyntaxHighlightConfig } from './types.js';
+export { extractFrontmatter, isFrontmatterValid, type ParseFrontmatterOptions, type ParseFrontmatterResult, parseFrontmatter, } from './frontmatter.js';
+export { rehypeHeadingIds } from './rehype-collect-headings.js';
+export { rehypePrism } from './rehype-prism.js';
+export { rehypeShiki } from './rehype-shiki.js';
+export { remarkCollectImages } from './remark-collect-images.js';
+export { type CreateShikiHighlighterOptions, createShikiHighlighter, type ShikiHighlighter, type ShikiHighlighterHighlightOptions, } from './shiki.js';
+export * from './types.js';
+export declare const syntaxHighlightDefaults: Required<SyntaxHighlightConfig>;
+export declare const markdownConfigDefaults: Required<AstroMarkdownOptions>;
+/**
+ * Create a markdown preprocessor to render multiple markdown files
+ */
+export declare function createMarkdownProcessor(opts?: AstroMarkdownProcessorOptions): Promise<MarkdownProcessor>;