Add optional name + docs (#25)

* Add optional name

* docs: add README.md with project documentation

tests/e2e/e2e.test.js

@@ -1,9 +1,9 @@
-const axios = require('axios');
-const app = require('../../src/server');
+const axios = require("axios");
+const app = require("../../src/server");
 let server;
 let baseURL;
 
-beforeAll(done => {
+beforeAll((done) => {
   server = app.listen(0, () => {
     const { port } = server.address();
     baseURL = `http://127.0.0.1:${port}`;
@@ -11,14 +11,14 @@ beforeAll(done => {
   });
 });
 
-afterAll(done => {
+afterAll((done) => {
   server.close(done);
 });
 
-describe('E2E GET /hello', () => {
-  it('responds with Hello world', async () => {
+describe("E2E GET /hello", () => {
+  it("responds with Hello world", async () => {
     const res = await axios.get(`${baseURL}/hello`);
     expect(res.status).toBe(200);
-    expect(res.data).toBe('Hello world');
+    expect(res.data).toBe("Hello world!");
   });
 });