feat: add user-agent endpoint

server.js

@@ -4,6 +4,7 @@ const PORT = process.env.PORT || 3000
 
 const server = http.createServer((req, res) => {
   if (req.url === '/') return respondHello(req, res)
+  if (req.url === '/user-agent') return respondUserAgent(req, res)
 
   res.end()
 })
@@ -12,6 +13,11 @@ function respondHello (req, res) {
   res.end(JSON.stringify({ msg: 'hello' }))
 }
 
+function respondUserAgent (req, res) {
+  const ua = req.headers['user-agent']
+  res.end(JSON.stringify({ ua }))
+}
+
 server.listen(PORT)
 console.log(`Server listening on port ${PORT}`)