Sure, here's an example script for a modern phone app for selling juices using React Native and Node.js:

1. First, create a new React Native project using the following command:

react-native init JuiceShop

2. Install the required dependencies for project:

npm install -g react-native-cli
npm install -g react-native-permissions
npm install -g react-native-vector-icons
npm install -g react-native-gesture-handler
npm install -g react-native-device-info
npm install -g react-native-colored-toast
npm install -g react-native-blend-mode

3. Create a new Node.js project in the Juiceop directory:

npm init -y
npm install express multer mongoose body-parser

4. Create a server.js file in the JuiceShop directory and add the following code:

const express = require('express');
const multer = require('multer');
const mongoose = require('mongoose');
const bodyParser = require('body-parser');

const app = express();
const PORT = 3000;

// Connect to MongoDB
mongoose.connect('mongodb://localhost/juicestop', { useNewUrlParser: true, useUnifiedTopology: true });

// Define a schema for our juice collection
const juiceSchema = new mongoose.Schema({
  name: String,
  image: String,
  price: Number,
  description: String,
  reviews: [
    { author: String, text: String }
  ]
});

// Create a model from the schema
const Juice = mongoose.model('Juice', juiceSchema);

// Listen for incoming requests
app.listen(PORT, () => {
  console.log(`Juice Shop app listening on port ${PORT}!`);
});

5. Create a routes.js file in the JuiceShop directory and add the following code:

const express = require('express');
const Juice = require('../models/juice');

const router = express.Router();

// GET /juices
router.get('/', async (req, res) => {
  console.log('Getting all juices');
  const juices = await Juice.find();
  res.render('juices', { juices });
});

// GET /juices/:id
router.get('/:id', async (req, res) => {
  console.log(`Getting juice ${req.params.id}`);
  const juice = await Juice.findById(req.params.id);
  if (juice) {
    res.render('juice', { juice });
  } else {
    res.status(404).render('404', { message: 'Juice not found' });
  }
});

// POST /juices
router.post('/', async (req, res) => {
  console.log('Adding new juice');
  const juice = await Juice.create({
    name: req.body.name,
    image: req.body.image,
    price: req.body.price,
    description: req.body.description
  });
  res.render('juice', { juice });
});

// PUT /juices/:id
router.put('/:id', async (req, res) => {
  console.log(`Updating juice ${req.params.id}`);
  const juice = await Juice.findById(req.params.id);
  if (juice) {
    await juice.update({
      name: req.body.name,
      image: req.body.image,
      price: req.body.price,
      description: req.body.description
    });
    res.render('juice', { juice });
  } else {
    res.status(404).render('404', { message: 'Juice not found' });
  }
});

// DELETE /juices/:id
router.delete('/:id', async (req, res) => {
  console.log(`Deleting juice ${req.params.id}`);
  const juice =