nginx-sample.conf

server {

    error_page 404 /404.html;

    server_name gocode.example.com;

    location / {
	proxy_set_header Host $host;
	proxy_set_header X-Real-IP $remote_addr;
	proxy_set_header X-Forwarded-Host $host:$server_port;
	proxy_set_header X-Forwarded-Server $host;
	proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
	proxy_set_header Upgrade $http_upgrade;
	proxy_set_header Connection upgrade;
	proxy_set_header Accept-Encoding gzip;
	proxy_pass http://localhost:6989/;
    }


    listen [::]:443 ssl; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/gocode.example.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/gocode.example.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}

server {
    if ($host = gocode.example.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

    server_name gocode.example.com;

    listen 80;
    listen [::]:80;
    return 404; # managed by Certbot


}g