auto install node env

[joeangel]

Install npm first

sudo apt-get install npm

ref: https://docs.npmjs.com/cli/install

sudo npm install -g n

ref: https://github.com/tj/n

[joeangel]

Install yarn

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
sudo apt-get update && sudo apt-get install yarn

ref: https://yarnpkg.com/lang/en/docs/install/#linux-tab

[joeangel]

Install pm2

npm install -g pm2

ref: https://www.npmjs.com/package/pm2