Setup GitHub repository for source code and CI

Github Repo - https://github.com/Vibhuti456/node-todo-cicd

Setup Job on Jenkins for application

Create two EC2 instance one Jenkins master and another Jenkins Slave:

Jenkins Master: The Jenkins Master is the main server, where you can manage.

Scheduling build jobs.
Dispatching builds to the slaves for the actual execution.
Monitor the slaves (possibly taking them online and offline as required).
Recording and presenting the build results.
A Master instance of Jenkins can also execute build jobs directly.

Jenkins Slave:

Jenkins Slaves are essentially worker machines that execute the actual build jobs.
They need Java to run a small Java program called the “agent”.
This agent listens for instructions from the Master, fetches build scripts and dependencies, and then uses the JRE to execute the build commands on the Slave machine.

Create Job in Jenkins Application:

Script for Node Application:

pipeline {
    agent { label "dev-server"}

    stages {

        stage("code"){
            steps{
                git url: "https://github.com/Vibhuti456/node-todo-cicd.git", branch: "master"
                echo 'code has cloned in slave system'
            }
        }
        stage("build and test"){
            steps{
                sh "docker build -t node-app-test-new ."
                echo 'image has built in slave system'
            }
        }
        stage("scan image"){
            steps{
                echo 'image has been scanned'
            }
        }
        stage("push"){
            steps{
                withCredentials([usernamePassword(credentialsId:"dockerHub",passwordVariable:"dockerHubPass",usernameVariable:"dockerHubUser")]){
                sh "docker login -u ${env.dockerHubUser} -p ${env.dockerHubPass}"
                sh "docker tag node-app-test-new:latest ${env.dockerHubUser}/node-app-test-new:latest"
                sh "docker push ${env.dockerHubUser}/node-app-test-new:latest"
                echo 'Image has been pushed in slave system'
                }
            }
        }
        stage("deploy"){
            steps{
                sh "docker-compose down && docker compose up -d"
                echo 'Deployement has been done successfully'
            }
        }
    }
}