nginx puma websocket config

nginx.conf

upstream rails_servers {
  server unix:///opt/app/www.yoursite.com/shared/sockets/puma.sock fail_timeout=0;
}

server {
  server_name www.yoursite.com;

  location /cable {
    proxy_redirect     off;
    proxy_set_header   Host $host;
    proxy_set_header   X-Forwarded-Host $host;
    proxy_set_header   X-Forwarded-Server $host;
    proxy_set_header   X-Real-IP        $remote_addr;
    proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
    proxy_buffering    on;
    proxy_http_version 1.1;
    proxy_set_header   Upgrade $http_upgrade;
    proxy_set_header   Connection "Upgrade";
    proxy_set_header   X-Forwarded-Proto https;
    proxy_pass         http://rails_servers;
    gzip off;
  }
}