nginx conf for Express JS and Socket IO on Ubuntu 16.04

nginx-express-socketio.conf

server {
  listen 80;
  listen [::]:80;

  server_name your-domain.name;

  location / {
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $host;
    proxy_http_version 1.1;
    proxy_pass http://your-domain.name:3000; # if your socket run on port 3000
  }
}

run node.js as service commands

# install pm2
sudo npm install -g pm2

# start app
pm2 start Server.js

# stop app
pm2 stop Server.js

# start app as server boot up
pm2 startup systemd
## replace your-username with your user login
sudo su -c "env PATH=$PATH:/opt/node/bin pm2 startup systemd -u your-username --hp /home/your-username"