Setup ESLint + Prettier, Re-setup Express

server/index.js

@@ -0,0 +1,12 @@
+import express from 'express'
+
+const app = express()
+const port = 3000
+
+app.get('/', (req, res) => {
+  res.send('Hello World!')
+})
+
+app.listen(port, () => {
+  console.log(`Server listening at http://localhost:${port}`)
+})