Move all samples to the root dir

Signed-off-by: Anca Iordache <anca.iordache@docker.com>

react-express-mysql/backend/test/sample.js

@@ -0,0 +1,32 @@
+const app = require('../index');
+
+const chai = require('chai');
+const chaiHttp = require('chai-http');
+
+chai.use(chaiHttp);
+chai.should();
+
+describe('API /healthz', () => {
+    it('it should return 200', (done) => {
+        chai.request(app)
+            .get('/healthz')
+            .end((err, res) => {
+                res.should.have.status(200);
+                done();
+            });
+    });
+});
+
+describe('API /', () => {
+    it('it should return Welcome message', (done) => {
+        chai.request(app)
+            .get('/')
+            .end((err, res) => {
+                res.should.have.status(200);
+                res.should.to.be.html;
+                res.text.should.be.equal("Hello Docker World\n");
+                done();
+            });
+    });
+});
+