essential forum code

backend/models/PostTag.js

@@ -0,0 +1,24 @@
+const { DataTypes } = require('sequelize');
+const sequelize = require('../config/database');
+
+const PostTag = sequelize.define('PostTag', {
+  id: {
+    type: DataTypes.UUID,
+    defaultValue: DataTypes.UUIDV4,
+    primaryKey: true
+  },
+  postId: {
+    type: DataTypes.UUID,
+    allowNull: false,
+    references: {
+      model: 'ForumPosts',
+      key: 'id'
+    }
+  },
+  tagName: {
+    type: DataTypes.STRING,
+    allowNull: false
+  }
+});
+
+module.exports = PostTag;