Ship Novya PWA with backend for deployable production use.

Fix production TypeScript builds and add DEPLOY.md so the app can be hosted from this repo.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/shared/validation/index.ts

@@ -0,0 +1,18 @@
+import type { ZodType } from 'zod';
+import { zValidator } from '@hono/zod-validator';
+
+export function jsonValidator<T extends ZodType>(schema: T) {
+  return zValidator('json', schema, (result) => {
+    if (!result.success) {
+      throw result.error;
+    }
+  });
+}
+
+export function queryValidator<T extends ZodType>(schema: T) {
+  return zValidator('query', schema, (result) => {
+    if (!result.success) {
+      throw result.error;
+    }
+  });
+}