v3: port static pages, make routes lib more flexible, share middlewares between v2 and v3, port v1, simplify server.js

test/api/v3/integration/status/GET-status.test.js

@@ -0,0 +1,12 @@
+import {
+  requester,
+} from '../../../../helpers/api-v3-integration.helper';
+
+describe('GET /status', () => {
+  it('returns status: up', async () => {
+    let res = await requester().get('/status');
+    expect(res).to.eql({
+      status: 'up',
+    });
+  });
+});