[chore] Fix headless docs build

Author: slax57

docs_headless/astro.config.mjs

@@ -344,6 +344,9 @@ export default defineConfig({
     },
     vite: {
         plugins: [tailwindcss()],
+        ssr: {
+            noExternal: ['zod'],
+        },
     },
     base: '/ra-core/',
     site: 'https://marmelab.com',

examples/ra-offline/package.json

@@ -42,4 +42,4 @@
     "vite-plugin-pwa": "^1.2.0"
   },
   "name": "ra-offline"
-}
+}