debug(seo): added build diagnostics to vite.config.ts

vite.config.ts

@@ -3,10 +3,12 @@ import vue from "@vitejs/plugin-vue";
 import path from "path";
 import prerender from "vite-plugin-prerender";
 
-export default defineConfig({
-  plugins: [
-    vue(),
-    prerender({
+export default defineConfig(({ mode }) => {
+  console.log(`🔨 Vite build mode: ${mode}`);
+  return {
+    plugins: [
+      vue(),
+      prerender({
       // REQUIRED: The path to the built app to prerender.
       staticDir: path.join(__dirname, 'dist'),
       // The routes to render.