Add safe fallback configuration for backend env variables

backend/server.js

@@ -3,23 +3,49 @@ const dotenv = require("dotenv");
 const cors = require("cors");
 const mongoose = require("mongoose");
 const path = require("path");
-const validateEnv = require("./config/validateEnv.js");
-
 const cookieParser = require("cookie-parser");
 
+const validateEnv = require("./config/validateEnv.js");
+
 const authRoutes = require("./routes/Auth");
 const inquiryRoutes = require("./routes/inquiryRoutes.js");
 const noticeRoutes = require("./routes/noticeRoutes.js");
 const applicationRoutes = require("./routes/applicationRoutes");
 const contactRoutes = require("./routes/contactRoutes.js");
 const teacherRoutes = require("./routes/teacherRoutes.js");
+
+// Load values from .env when available
 dotenv.config();
+
+// Safe development fallbacks
+process.env.PORT = process.env.PORT || "5000";
+process.env.MONGO_URL =
+  process.env.MONGO_URL || "mongodb://127.0.0.1:27017/school_website";
+process.env.JWT_SECRET =
+  process.env.JWT_SECRET || "fallback_development_secret_key";
+
+const PORT = process.env.PORT;
+const MONGO_URL = process.env.MONGO_URL;
+
 const app = express();
-app.use(cors({ origin: "http://localhost:5173", credentials: true }));
+
+// Middleware
+app.use(
+  cors({
+    origin: process.env.FRONTEND_URL || "http://localhost:5173",
+    credentials: true,
+  })
+);
+
 app.use(express.json());
-validateEnv();
 app.use(cookieParser());
 
+<<<<<<< HEAD
+// Validate environment variables after applying fallbacks
+validateEnv();
+
+=======
+>>>>>>> upstream/main
 // Routes
 app.use("/api/auth", authRoutes);
 app.use("/api/inquiries", inquiryRoutes);
@@ -29,31 +55,41 @@ app.use("/api/contact", contactRoutes);
 app.use("/api/teacher", teacherRoutes);
 app.use("/uploads", express.static(path.join(__dirname, "uploads")));
 
+<<<<<<< HEAD
+// Connect to MongoDB
+=======
 // Connect to mongodb with try-catch
+>>>>>>> upstream/main
 async function connectDB() {
   if (!process.env.MONGO_URL) {
     console.warn("WARNING: MONGO_URL not found. Skipping database connection. API endpoints that require the database will not work.");
     return;
   }
   try {
-    await mongoose.connect(process.env.MONGO_URL);
-    console.log(" connected to mongodb");
+    await mongoose.connect(MONGO_URL);
+    console.log("Connected to MongoDB");
   } catch (error) {
-    console.log(" Database connection failed:", error.message);
+    console.error("Database connection failed:", error.message);
     process.exit(1);
   }
 }
 
-connectDB();
+<<<<<<< HEAD
+// Start the server after MongoDB connects
+async function startServer() {
+  await connectDB();
 
-const PORT = process.env.PORT || 5000;
+  app
+    .listen(PORT, () => {
+      console.log(`Server started on port ${PORT}`);
+    })
+    .on("error", (error) => {
+      console.error("Server error:", error.message);
+      process.exit(1);
+    });
+}
+=======
+connectDB();
+>>>>>>> upstream/main
 
-// Start server with error handling
-app
-  .listen(PORT, () => {
-    console.log(`server is started on port ${PORT}`);
-  })
-  .on("error", (err) => {
-    console.log("Server error:", err.message);
-    process.exit(1);
-  });
+startServer();