Add not-founde page

app/router.js

@@ -32,4 +32,5 @@ Router.map(function () {
     });
   });
   this.route('login');
+  this.route('not-found', { path: '/*path' });
 });

app/routes/not-found.js

@@ -0,0 +1,3 @@
+import Route from '@ember/routing/route';
+
+export default class NotFoundRoute extends Route {}

app/templates/not-found.hbs

@@ -0,0 +1,7 @@
+<div class='flex flex-col justify-center min-h-screen'>
+  <div class='mx-auto text-center'>
+    <h1 class="text-8xl mb-4">404</h1>
+    <h2 class="text-4xl mb-4">Page not found</h2>
+    <LinkTo @route="application">Go back home</LinkTo>
+  </div>
+</div>

tests/unit/routes/not-found-test.js

@@ -0,0 +1,11 @@
+import { module, test } from 'qunit';
+import { setupTest } from 'meiliadmin/tests/helpers';
+
+module('Unit | Route | not-found', function (hooks) {
+  setupTest(hooks);
+
+  test('it exists', function (assert) {
+    let route = this.owner.lookup('route:not-found');
+    assert.ok(route);
+  });
+});