got add, remove, and edit actions working

server/index.js

@@ -0,0 +1,38 @@
+// @ts-check
+const express = require('express');
+const bodyParser = require('body-parser');
+const cors = require('cors');
+const app = express();
+
+const store = {
+  /** @type {any} */
+  todos: {}
+};
+
+app.use(bodyParser.json());
+app.use(cors());
+
+app.get('/todos', (req, res) => {
+  res.json(store.todos);
+});
+
+app.put('/todos/:id', (req, res) => {
+  store.todos[req.params.id] = req.body;
+  res.json('ok');
+});
+
+app.post('/todos/:id', (req, res) => {
+  store.todos[req.params.id] = req.body;
+});
+
+app.delete('/todos/:id', (req, res) => {
+  delete store.todos[req.body.id];
+});
+
+app.post('/todos', (req, res) => {
+  store.todos = req.body;
+});
+
+app.listen(3000, () => {
+  console.log('Listening at http://localhost:3000');
+});