index.js

const express = require("express");
const app = express();
const mongoose = require("mongoose");
const dotenv = require("dotenv");
const authRoute = require("./routes/auth");
const userRoute = require("./routes/users");
const cors = require("cors");
const path = require("path");
const verify = require("./verifyToken");
dotenv.config();

mongoose
  .connect(process.env.MONGO_URL)
  .then(() => console.log("DB connection success..."))
  .catch((err) => console.log(err));

app.use(express.json());

const corsOptions = {
  origin: "*",
  credentials: true, // Access-control-allow-credentials:true
  optionSuccessStatus: 200,
};

app.use(cors(corsOptions)); // Use this after the variable declaration

app.use("/api/auth", authRoute);
app.use("/api/users", verify, userRoute);

// Deloy
if (process.env.NODE_ENV === "production") {
  app.use(express.static(path.join(__dirname, "/client/build")));

  app.get("*", (req, res) => {
    res.sendFile(path.join(__dirname, "/client/build", "index.html"));
  });
}

app.listen(process.env.PORT || 8800, () => {
  console.log("Backend server is running...");
});