Add JSDoc to server/model/*

Signed-off-by: Matthew Nickson <mnickson@sidingsmedia.com>

server/model/tag.js

@@ -1,6 +1,11 @@
 const { BeanModel } = require("redbean-node/dist/bean-model");
 
 class Tag extends BeanModel {
+
+    /**
+     * Return a object that ready to parse to JSON
+     * @returns {Object}
+     */
     toJSON() {
         return {
             id: this._id,