chore: add an example for SSR (#8298)

<img width="740" alt="Screen Shot 2020-05-20 at 16 31 30" src="https://user-images.githubusercontent.com/1174278/82458770-673d8880-9ab7-11ea-81d3-8ac0c1e52705.png">

example/e2e/__integration_tests__/server.test.tsx

@@ -0,0 +1,13 @@
+import fetch from 'node-fetch';
+import cheerio from 'cheerio';
+
+const server = 'http://localhost:3275';
+
+it('renders the home page', async () => {
+  const res = await fetch(server);
+  const html = await res.text();
+
+  const $ = cheerio.load(html);
+
+  expect($('title').text()).toBe('Examples');
+});

example/e2e/config/setup-server.tsx

@@ -1,8 +1,16 @@
 import { setup } from 'jest-dev-server';
 
 export default async function () {
-  await setup({
-    command: 'yarn serve -l 3579 web-build',
-    port: 3579,
-  });
+  await setup([
+    {
+      command: 'yarn serve -l 3579 web-build',
+      launchTimeout: 50000,
+      port: 3579,
+    },
+    {
+      command: 'yarn server',
+      launchTimeout: 50000,
+      port: 3275,
+    },
+  ]);
 }