fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/zod-to-json-schema/dist/esm/errorMessages.js

@@ -0,0 +1,14 @@
+export function addErrorMessage(res, key, errorMessage, refs) {
+    if (!refs?.errorMessages)
+        return;
+    if (errorMessage) {
+        res.errorMessage = {
+            ...res.errorMessage,
+            [key]: errorMessage,
+        };
+    }
+}
+export function setResponseValueAndErrors(res, key, value, errorMessage, refs) {
+    res[key] = value;
+    addErrorMessage(res, key, errorMessage, refs);
+}