Create a Dockerfile for a simple Node.js application that serves “Hello World” on port 3000.

Question

Create a Dockerfile for a simple Node.js application that serves “Hello World” on port 3000. Build the Docker image with tag my-node-app and run a container. Below is the sample index.js file.

const express = require('express');
const app = express();
 
app.get('/', (req, res) => {
    res.send('Hello World');
});
 
app.listen(3000, () => {
    console.log('Server is running on port 3000');
});

Tag the Docker image my-node-app from Task 3 with a version tag v1.0.0.

Solution

Dockerfile

FROM node:20.13.1-alpine

WORKDIR /app

COPY index.js /app
COPY package.json /app
COPY package-lock.json /app

RUN npm i

CMD ["node", "index.js"]

Build the image

docker build -f Dockerfile -t my-node-app:v1.0.0 .

Push the image to Docker Hub

docker login

Then build the image with your repo name, For eg, `syedjaferkhub`

docker push syedjaferkhub/my-node-app:v1.0.0

Eg: https://hub.docker.com/u/syedjaferkhub