Prepped server

server/index.js

@@ -1,7 +1,16 @@
 import express from "express";
+import dotenv from "dotenv";
+dotenv.config();
+import cors from "cors";
 
 const app = express();
-const PORT = 3000;
+let PORT = process.env.APP_PORT;
+
+app.use(
+  cors({
+    origin: process.env.CLIENT_URL,
+  })
+);
 
 app.get("/", (req, res) => {
   res.send("Hello from Express!");