copy backend to different frontend folder

frontend/frontend/src/pages/Home/stages/Theme.js

@@ -4,7 +4,7 @@ import React from 'react';
 import PropTypes from 'prop-types';
 
 import { Card } from '../../../components';
-import { themes } from '../../../../backend/themes/index.js';
+import { themes } from '../../../backend/themes/index.js';
 
 const ThemeStage = ({ theme, setTheme, fullSuffix }) => {
   return (

frontend/vercel.json

@@ -1,5 +1,5 @@
 {
-  "buildCommand": " cp -r ../../backend/ ./backend/ && yarn build-trends",
+  "buildCommand": " cp -r ../../backend/ ./src/backend/ && yarn build-trends",
   "outputDirectory": "build",
   "installCommand": "yarn install"
 }