Remove index.html, styles.css, favicon.svg, script.js, and tailwind.config.js files to streamline the project and eliminate unused resources.

models/User.js

@@ -0,0 +1,24 @@
+const mongoose = require('mongoose');
+
+const userSchema = new mongoose.Schema({
+  username: {
+    type: String,
+    required: true,
+    unique: true
+  },
+  password: {
+    type: String,
+    required: true
+  },
+  role: {
+    type: String,
+    enum: ['admin', 'staff'],
+    default: 'staff'
+  },
+  createdAt: {
+    type: Date,
+    default: Date.now
+  }
+});
+
+module.exports = mongoose.model('User', userSchema);