Only required headers for KF

nginx_conf.partial

# WebSocket proxying
map $http_upgrade $connection_upgrade {
    default         upgrade;
    ''              close;
}
server {
    server_name  examplecat.com;
    location / {
        # Backend nodejs server
        #for uploading
        client_max_body_size 500M;

        #for ipaddress for logging
        proxy_set_header Host $http_host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Forwarded-Host $http_host;
        proxy_set_header X-Forwarded-Server $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        proxy_pass          http://127.0.0.1:8086;
        proxy_http_version  1.1;
        proxy_set_header    Upgrade     $http_upgrade;
        proxy_set_header    Connection  $connection_upgrade;
        #proxy_set_header Connection "upgrade";
    }
}