nginx conf for mqtt websocket

mqtt.conf

upstream websocket {
    server localhost:9001;
}

server {

     server_name mqtt.sujitpatel.in; #change accordingly

     location / {
         proxy_pass http://websocket;
         proxy_http_version 1.1;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection "upgrade";
         proxy_set_header Host $host;
     }

}