🚀 feat: Banner (#3952)

* feat: Add banner schema and model

* feat: Add optional JwtAuth

To handle the conditional logic with and without authentication within the model.

* feat: Add an endpoint to retrieve a banner

* feat: Add implementation for client to use banner and access API

* feat: Display a banner on UI

* feat: Script for updating and deleting banners

* style: Update banner style

* fix: Adjust the height when the banner is displayed

* fix: failed specs

api/models/schema/banner.js

@@ -0,0 +1,36 @@
+const mongoose = require('mongoose');
+
+const bannerSchema = mongoose.Schema(
+  {
+    bannerId: {
+      type: String,
+      required: true,
+    },
+    message: {
+      type: String,
+      required: true,
+    },
+    displayFrom: {
+      type: Date,
+      required: true,
+      default: Date.now,
+    },
+    displayTo: {
+      type: Date,
+    },
+    type: {
+      type: String,
+      enum: ['banner', 'popup'],
+      default: 'banner',
+    },
+    isPublic: {
+      type: Boolean,
+      default: false,
+    },
+  },
+
+  { timestamps: true },
+);
+
+const Banner = mongoose.model('Banner', bannerSchema);
+module.exports = Banner;