added routes

src/routes/todo.ts

+import express from 'express'
+
+const router = express.Router()
+
+router.get('/api/todo', (req, res) => {
+    return res.send('the todo')
+})
+
+router.post('/api/todo', (req, res) => {
+    return res.send('new todo created')
+})
+
+export { router as todoRouter }
\ No newline at end of file