added register.js to store hash password to db

server.js

@@ -1,28 +1,49 @@
 const express = require("express");
 const dotenv = require("dotenv");
 const bodyParser = require("body-parser");
+const jwt = require("jsonwebtoken");
 
 // Initialize app
 const app = express();
 
-// Load environment variables
+// Load environment variables from .env file
 dotenv.config();
 
 // Middleware for parsing JSON
 app.use(bodyParser.json());
 
+// Middleware to check JWT token for protected routes
+const authenticateToken = (req, res, next) => {
+  const token = req.header("Authorization")?.split(" ")[1]; // Get token from header
+
+  if (!token) {
+    return res.status(403).send("A token is required for authentication");
+  }
+
+  try {
+    const jwtSecretKey = process.env.JWT_SECRET_KEY || "defaultSecretKey";
+    const verified = jwt.verify(token, jwtSecretKey);
+    req.user = verified; // Store user data in req object
+  } catch (err) {
+    return res.status(401).send("Invalid token");
+  }
+  next();
+};
+
 // Import routes
 const popcenRoutes = require("./api/routes/popcen");
 const popcenCountRoutes = require("./api/routes/popcenCount");
 const userRoutes = require("./api/routes/user");
+const registerRoutes = require("./api/routes/register"); // Register route
 
 // Use routes
-app.use("/popcen", popcenRoutes);
-app.use("/popcenCount", popcenCountRoutes);
 app.use("/user", userRoutes);
+app.use("/user/register", registerRoutes);
+app.use("/popcen", authenticateToken, popcenRoutes); // Protect popcen routes with JWT
+app.use("/popcenCount", authenticateToken, popcenCountRoutes); // Protect popcenCount routes
 
 // Start server
-const PORT = 3000;
+const PORT = process.env.PORT || 3000;
 app.listen(PORT, () => {
   console.log(`Server is running on port ${PORT}`);
 });