install

# nodejs
curl -fsSL https://deb.nodesource.com/setup_lts.x | sudo -E bash -
sudo apt-get install -y nodejs

# package websocket (https://github.com/websockets/ws)
npm install ws
# packages optionals
npm install --save-optional bufferutil
npm install --save-optional utf-8-validate

ORM

https://tutoriels.edu.lat/pub/typeorm/typeorm-creating-a-simple-project/typeorm-creation-d-un-projet-simple