feat: add frontend

frontend/test/Loader.spec.js

@@ -0,0 +1,9 @@
+import { mount } from '@vue/test-utils'
+import Loader from '@/components/Loader.vue'
+
+describe('Loader', () => {
+  test('is a Vue instance', () => {
+    const wrapper = mount(Loader);
+    expect(wrapper.vm).toBeTruthy()
+  })
+})