AWS Elasticbeasnstalk NodeJS 10.x and Yarn

01-yarn.config

# file: .ebextensions/01-yarn.config
commands:
  01_create_npmrc:
    # run this command from /tmp directory
    cwd: /tmp
    command: 'sudo touch /tmp/.npmrc \
    | sudo echo \
    "//registry.npmjs.org/:_authToken=$(sudo /opt/elasticbeanstalk/bin/get-config environment -k NPM_TOKEN)"  \
    | sudo tee /tmp/.npmrc'

  02_remove_clean_and_install_latest_nodejs:
    # run this command from /tmp directory
    cwd: /tmp
    test: '[ -f /usr/bin/node ] && echo "remove previouse node"'
    command: 'sudo yum remove -y nodejs | sudo rm /etc/yum.repos.d/nodesource*'

  03_node_get:
    # run this command from /tmp directory
    cwd: /tmp
    # flag -y for no-interaction installation
    command: 'sudo curl --silent --location https://rpm.nodesource.com/setup_10.x | sudo bash -'

  04_node_install:
    # run this command from /tmp directory
    cwd: /tmp
    command: 'sudo yum -y install nodejs'

  05_yarn_get:
    # run this command from /tmp directory
    cwd: /tmp
    # don't run the command if yarn is already installed (file /usr/bin/yarn exists)
    test: '[ ! -f /usr/bin/yarn ] && echo "yarn not installed"'
    command: 'sudo wget https://dl.yarnpkg.com/rpm/yarn.repo -O /etc/yum.repos.d/yarn.repo'

  06_yarn_install:
    # run this command from /tmp directory
    cwd: /tmp
    test: '[ ! -f /usr/bin/yarn ] && echo "yarn not installed"'
    command: 'sudo yum -y install yarn'