Working HTTPS proxy configuration for code http server

vscode.nginx

# code serve-web --port 3291 --connection-token <token>
server {
    listen 443 ssl;
    server_name hangar.local;

    ssl_certificate     /path/to/cert.crt;
    ssl_certificate_key /path/to/cert.key;

    ssl_protocols       TLSv1.2 TLSv1.3;
    ssl_ciphers         HIGH:!aNULL:!MD5;

    location / {
        proxy_pass         http://127.0.0.1:3291/;
        proxy_http_version 1.1;

        proxy_set_header Host $http_host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header REMOTE-HOST $remote_addr;
        proxy_set_header   Upgrade          $http_upgrade;
        proxy_set_header   Connection       "Upgrade";
        proxy_connect_timeout      60;
        proxy_send_timeout         90;
        proxy_read_timeout         90;
        proxy_buffer_size          4k;
        proxy_buffers              4 32k;
        proxy_busy_buffers_size    64k;
        proxy_temp_file_write_size 64k;
        add_header X-Cache $upstream_cache_status;
    }
}