fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/astro/dist/preferences/defaults.d.ts

@@ -0,0 +1,16 @@
+export declare const DEFAULT_PREFERENCES: {
+    devToolbar: {
+        /** Specifies whether the user has the Dev Overlay enabled */
+        enabled: boolean;
+    };
+    checkUpdates: {
+        /** Specifies whether the user has the update check enabled */
+        enabled: boolean;
+    };
+    _variables: {
+        /** Time since last update check */
+        lastUpdateCheck: number;
+    };
+};
+export type Preferences = typeof DEFAULT_PREFERENCES;
+export type PublicPreferences = Omit<Preferences, '_variables'>;