Step 1: Install nvm package

curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.0/install.sh | bash

Step 2: Set Env

export NVM_DIR="/root/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm

Step 3: Install node version

User guide: https://github.com/nvm-sh/nvm#usage

nvm install 12