nginx reverse proxy to znc

znc_proxy.conf

server {
    listen 443 ssl;
    location /znc/ {
        proxy_set_header  Host            $http_host;
        proxy_set_header  X-NginX-Proxy   true;
        proxy_set_header  X-Real-IP       $remote_addr;
        proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass_header Set-Cookie;
        proxy_pass http://127.0.0.1:6664;

        location ~* \.(?:jpg|jpeg|png|gif|ico|css|js|ttf)$ {
            expires             1y;
            add_header          Cache-Control public;
            proxy_set_header    X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_pass          http://127.0.0.1:6664;
        }
}