gistfile1.txt

map $http_upgrade $connection_upgrade {
    default upgrade;
    ''      close;
}

inside your server block:

    location / {
        proxy_pass http://127.0.0.1:8092/;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
        proxy_read_timeout 6000;
    }