Add full project files

models/TaxModel.js

@@ -0,0 +1,15 @@
+const mongoose = require("mongoose");
+const timestamp = require("mongoose-timestamp");
+const mongoosePaginate = require("mongoose-paginate-v2");
+
+const modelSchema = new mongoose.Schema({
+    type: { type: String, enum: ["course", "product", "service"], required: true },
+    tax: { type: Number, required: true, default: 9 }, // درصد مالیات
+    is_active: { type: Boolean, default: true },
+ 
+});
+
+modelSchema.plugin(timestamp);
+modelSchema.plugin(mongoosePaginate);
+const PostModel = mongoose.model("Tax", modelSchema);
+module.exports = PostModel;