fix: send back user IP address, not website address

index.js

@@ -22,7 +22,7 @@ app.get("/", function (req, res) {
 // your first API endpoint...
 app.get("/api/whoami", (req, res) => {
   res.json({
-    ipaddress: req.headers.host,
+    ipaddress: req.ip,
     language: req.headers["accept-language"],
     software: req.headers["user-agent"],
   });