major functionalities are fixed

apps/Backend/src/index.ts

@@ -0,0 +1,11 @@
+import app from './app';
+import dotenv from 'dotenv';
+
+dotenv.config();
+
+const HOST = process.env.HOST;
+const PORT = process.env.PORT;
+
+app.listen(PORT, () => {
+  console.log(`Server running at http://${HOST}:${PORT}`);
+});