nginx.conf

user www-data;
worker_processes auto;
pid /run/nginx.pid;

http {
  access_log /var/log/nginx/access.log;
  error_log /var/log/nginx/error.log;

  upstream challenge-nodejs {
    server 127.0.0.1:3001;
  }

  server {
    listen 80;
    root /home/monkeymusic/mmc/public;
    server_name competition.monkeymusicchallenge.com;

    location / {
      # proxy requests to Node.js server
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection "upgrade";
      proxy_set_header Host $http_host;
      proxy_http_version 1.1;
      proxy_pass http://challenge-nodejs;
      # show error page if Node.js server is down
      proxy_intercept_errors on;
      error_page 502 /error.html;
    }

    # needed for serving error page from disk
    location /error.html {
    }
  }
}

# needed, but use defaults
events {
}