Reuse agent (docker container) in Jenkins between multiple stages

See reuseNode option for Jenkins Pipeline docker agent:
https://jenkins.io/doc/book/pipeline/syntax/#agent

pipeline {  agent any  stages {    stage('NPM install') {      agent {        docker {          /*           * Reuse the workspace on the agent defined at top-level of           * Pipeline, but run inside a container.           */          reuseNode true          image 'node:12.16.1'        }      }      environment {        /*         * Change HOME, because default is usually root dir, and         * Jenkins user may not have write permissions in that dir.         */        HOME = "${WORKSPACE}"      }      steps {        sh 'env | sort'        sh 'npm install'      }    }  } }

You can use scripted pipelines, where you can put multiple stage steps inside a docker step, e.g.

node {  checkout scm  docker.image('node:10-alpine').inside {    stage('Build') {       sh 'npm run build'     }     stage('Test') {       sh 'npm run test'     }  }}

(code untested)

For Declarative pipeline, one solution can be to use Dockerfile in the root of the project. For e.g.

Dockerfile

FROM node:10-alpine// Further Instructions

Jenkinsfile

pipeline{    agent {        dockerfile true    }    stage('Build') {        steps{            sh 'npm run build'        }    }     stage('Test') {        steps{            sh 'npm run test'        }    }}