test: add integration test

test/integration/index.test.js

@@ -0,0 +1,9 @@
+/* global describe, test */
+const app = require('../../app')
+const request = require('supertest')
+
+describe('Home page', () => {
+  test('it should render the landing page', () => {
+    return request(app).get('/').expect(200)
+  })
+})