Nginx Reverse proxy to another server

reverse-proxy.conf.d

upstream node {
  # THIS IS THE IP ADDRESS TO PROXY TO
  server 35.222.33.12:80 max_fails=2  fail_timeout=2s;
}
server {
  listen                  80;
  server_name             _;
  root                    /usr/share/nginx/html;
  location / {
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
    # CHANGE ME
    proxy_set_header Host $host;
    proxy_pass http://node;
    proxy_redirect off;
    port_in_redirect off;
  }
}