fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/mdast-util-to-markdown/lib/handle/thematic-break.d.ts

@@ -0,0 +1,11 @@
+/**
+ * @param {ThematicBreak} _
+ * @param {Parents | undefined} _1
+ * @param {State} state
+ * @returns {string}
+ */
+export function thematicBreak(_: ThematicBreak, _1: Parents | undefined, state: State): string;
+import type { ThematicBreak } from 'mdast';
+import type { Parents } from 'mdast';
+import type { State } from 'mdast-util-to-markdown';
+//# sourceMappingURL=thematic-break.d.ts.map