no idea what i did

server/server.ts

@@ -1,10 +1,13 @@
 import express from "express";
-
 import connectDB from "./config/db";
-
 import path from "path";
+import cors from "cors";
+
 const app = express();
 
+// add cors otherwise fronend cannot access backedn
+app.use(cors());
+
 connectDB();
 
 app.use(express.json());
@@ -18,7 +21,7 @@ app.use("/api/posts", require("./routers/api/posts"));
 if (process.env.NODE_ENV === "production") {
   console.log("in production");
   app.use(express.static("client/build"));
-  app.get("*", (req, res) => [
+  app.get("*", (_, res) => [
     res.sendFile(path.resolve(__dirname, "client", "build", "index.html")),
   ]);
 }