add example for https://github.com/kataras/iris/issues/1653

_examples/file-server/spa-vue-router/frontend/js/app.js

@@ -0,0 +1,33 @@
+// 0. If using a module system (e.g. via vue-cli), import Vue and VueRouter
+// and then call `Vue.use(VueRouter)`.
+
+// 1. Define route components.
+// These can be imported from other files
+const Foo = { template: '<div>foo</div>' }
+const Bar = { template: '<div>bar</div>' }
+
+// 2. Define some routes
+// Each route should map to a component. The "component" can
+// either be an actual component constructor created via
+// `Vue.extend()`, or just a component options object.
+// We'll talk about nested routes later.
+const routes = [
+  { path: '/foo', component: Foo },
+  { path: '/bar', component: Bar }
+]
+
+// 3. Create the router instance and pass the `routes` option
+// You can pass in additional options here, but let's
+// keep it simple for now.
+const router = new VueRouter({
+  routes // short for `routes: routes`
+})
+
+// 4. Create and mount the root instance.
+// Make sure to inject the router with the router option to make the
+// whole app router-aware.
+const app = new Vue({
+  router
+}).$mount('#app')
+
+// Now the app has started!