add basic backend code

web/frontend/vue.config.js

@@ -0,0 +1,19 @@
+module.exports = {
+  pluginOptions: {
+    prerenderSpa: {
+      registry: undefined,
+      renderRoutes: [
+        '/'
+      ],
+      useRenderEvent: true,
+      headless: true,
+      onlyProduction: true,
+      postProcess: route => {
+        route.html = route.html
+          .replace(/<script (.*?)>/g, '<script $1 defer>')
+          .replace('id="app"', 'id="app" data-server-rendered="true"')
+        return route
+      }
+    }
+  }
+}