make Config working right. Article model looks restored

src/core/Article.ts

@@ -124,7 +124,7 @@ async function processArticle(article) {
     if (previewId) {
         preview = await Image.findById(previewId)
     } else {
-        // preview = await resolveDefaultPreview()
+        preview = await resolveDefaultPreview()
     }
 
     return new Article({

src/core/Config.ts

@@ -1,18 +1,16 @@
 import Data from './Data'
 import { findOne } from '../lib/store'
 
-export default class Config {
-    static get store() {
-        return Data.getStore('Settings')
-    }
+const store = () => Data.getStore('Settings')
 
+export default class Config {
     static async findConfig() {
         const config = await Config.findById('settings')
         return config || new Config({} as any)
     }
 
-    static async findById(id) {
-        const data = await findOne(Config.store, { id })
+    static async findById(id: string) {
+        const data = await findOne(store(), { id })
         if (!data) return null
 
         return new Config(data)

src/core/db.ts

@@ -42,7 +42,7 @@ function init(db) {
     Data.setStore('Image', db.collection('images'))
     Data.setStore(Teacher, db.collection('collective'))
     Data.setStore(Document, db.collection('documents'))
-    Data.setStore(Settings, db.collection('settings'))
+    Data.setStore('Settings', db.collection('settings'))
 
     return db
 }