fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/astro/dist/assets/utils/metadata.d.ts

@@ -0,0 +1,10 @@
+import type { ImageMetadata } from '../types.js';
+/**
+ * Extracts image metadata such as dimensions, format, and orientation from the provided image data.
+ *
+ * @param {Uint8Array} data - The binary data of the image.
+ * @param {string} [src] - The source path or URL of the image, used for error messages. Optional.
+ * @return {Promise<Omit<ImageMetadata, 'src' | 'fsPath'>>} A promise that resolves with the extracted metadata, excluding `src` and `fsPath`.
+ * @throws {AstroError} Throws an error if the image metadata cannot be extracted.
+ */
+export declare function imageMetadata(data: Uint8Array, src?: string): Promise<Omit<ImageMetadata, 'src' | 'fsPath'>>;