npm install fails in jenkins pipeline in docker

Adding the environments and setting the Home to '.' solves this as below.

pipeline {    agent { docker { image 'node:8.12.0' } }    environment {        HOME = '.'    }    stages {        stage('Clone') {            steps {                git branch: 'master',                    credentialsId: '121231k3jkj2kjkjk',                    url: 'https://myserver.com/my-repo.git'            }        }        stage('Build') {            steps {                sh "npm install"            }        }    }}

from https://github.com/jenkins-infra/jenkins.io/blob/master/Jenkinsfile

docker.image('openjdk:8').inside {    /* One Weird Trick(tm) to allow git(1) to clone inside of a    * container    */    withEnv([        /* Override the npm cache directory to avoid: EACCES: permission denied, mkdir '/.npm' */        'npm_config_cache=npm-cache',        /* set home to our current directory because other bower        * nonsense breaks with HOME=/, e.g.:        * EACCES: permission denied, mkdir '/.config'        */        'HOME=.',    ]) {            // your code    }}

Having wasted a whole day on this issue, I found simply adding the following as an environment variable at the agent stage using the Pipeline Editor removed the problem.

'npm_config_cache=npm-cache'