Hello

Steps for docker Check Docker version: docker --version

Check Docker system information: docker info

List all Docker images on the local system: docker images

Search for an image in Docker Hub: docker search <image_name>

Pull an image from Docker Hub: docker pull <image_name>

Build an image from a Dockerfile: docker build -t <image_name>: .

Tag an image (for versioning or renaming): docker tag <image_id> <repository_name>:

Remove an image: docker rmi <image_name>

List all running containers: docker ps

List all containers (including stopped ones): docker ps -a

Run a container from an image: docker run -d -p <host_port>:<container_port> <image_name>

Run a container in interactive mode: docker run -it <image_name> /bin/bash

Stop a running container: docker stop <container_id>

Start a stopped container: docker start <container_id>

Restart a running container: docker restart <container_id>

Remove a stopped container: docker rm <container_id>

Remove all stopped containers: docker container prune

View container logs: docker logs <container_id>

Execute a command inside a running container: docker exec -it <container_id>

Copy files from container to host: docker cp <container_id>:/path_in_container /path_on_host

Copy files from host to container: docker cp /path_on_host <container_id>:/path_in_container

View the container's stats (resource usage): docker stats

Display Docker container processes (similar to top command): docker top <container_id>

List Docker volumes: docker volume ls

Remove a Docker volume: docker volume rm <volume_name>

Run a container and remove it once it's stopped: docker run --rm <image_name>

View network details of Docker: docker network ls

Create a Docker network: docker network create <netwo

************* to create docker web application

Dockerfile code =>

Use an official Node.js runtime as the base image

FROM node:14-alpine

Set the working directory inside the container

WORKDIR /app

Copy the package.json and package-lock.json to the working directory

COPY package*.json ./

Install Node.js dependencies

RUN npm install

Copy the rest of the application code to the container

COPY . .

Expose port 3000 for the application

EXPOSE 3000

Define the command to run the application

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

2. app.js const express = require('express'); const app = express();

app.get('/', (req, res) => { res.send('Hello, Docker!'); });

app.get('/hello', (req, res) => { res.send('Hello, World!'); });

app.get('/docker', (req, res) => { res.send('This is a Dockerized Express.js application!'); });

app.listen(3000, () => { console.log(App running on port 4000); });

3. execute the file by , docker build -t ( image name to set) .=> run in the folder of the js file ( dont forgt to use dot

4. run the docker command docker run -p 4000:3000 image name