Basic app.js

app.js

import express from "express";
import fs from "fs";
import path from "path";
import { fileURLToPath } from "url";
import config from "config";
import cors from "cors";

// Database connection
import "./utils/dbConnect.js";

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

const app = express();
const PORT = config.get("PORT") || 9989;

// CORS configuration
const corsOptions = {
    origin: [
        "https://cs24.code.in",
        "http://localhost:3000",
        "https://suhailroushan.in",
    ],
    methods: ["GET", "POST", "PUT", "DELETE"],
    credentials: true,
};
app.use(cors(corsOptions));

// Middleware setup
app.use(express.json());

// Use API routes

// Serve React build folder if exists
const buildPath = path.join(__dirname, "dist");
if (fs.existsSync(buildPath)) {
    app.use(express.static(buildPath));
    app.get("/*", (req, res) => {
        res.sendFile(path.join(buildPath, "index.html"));
    });
}

// 404 handler
app.use((req, res) => {
    res.status(404).send("404 - Not Found");
});

// Error handler
app.use((err, req, res, next) => {
    console.error(err.stack);
    res.status(500).send("500 - Internal Server Error");
});

// Start the server
app.listen(PORT, () => {
    console.log(`Server is running on PORT 🚀 ${PORT}`);
});