I have created called visitor. The project contains package.json, index.js, Dockerfile and docker-compose.yml. I’m newbie and try to learning about K8S, docker. Please help me solve it.

package.json

`{
   "dependencies": {
        "express": "*",
        "redis": "2.8.0"
   },
    "scripts": {
        "start": "node index.js"
    }
}`

index.js

`const express = require('express');
const redis =require('redis');

const app = express();
const client = redis.createClient({
    host: 'redis-server',
    port: 6379
});
client.set('visitor', 0);

app.get('/', (req, res)  => {
    client.get('visitor', (err, visitor) => {
        res.send('Number of visitor is '+ visitor);
        client.set('visitor', parseInt(visitor) + 1);
    });
});

app.listen(8081, () => {
    console.log('Listening on port 8081');
});`

Dockerfile

`FROM node:alpine

WORKDIR '/app'

COPY package.json .

RUN npm install

COPY . .

CMD ["npm", "start"]`

docker-compose.yml

`version: '3'
services: 
  redis-server:
      image: 'redis'
  node-app:
      build: .
      ports:
        - "4001:8081"` 

Here is the log error when I run command in Command Prompt

I expect that no error occur.