Initial server response time is coming very long of about 3 seconds or more

Developer help Installation
1

We need help on reducing initial server response time.

We have setup ghost blog for our website according to official documentation but initials server response time is coming very large about more than 3 seconds. you can check in google page insights.
i attached scrrenshot here too

blog
blog3198×1796 512 KB

  • what are the things we tried?
  1. we tried just blog without website to check if website is not causing the problem but it was notthe case.
  2. we have another blog with same configuration and and it is working fine so we used DB from that blog to this blog but that did not work.
  3. we tried fresh setup on new server. even tried new server on different cloud platform but still same output.
  4. we. checked DNS configuration and nginx configuration it is same as our another blog which is working fine but this one has larger initial response time.

  • What’s your URL? This is the easiest way for others to debug your issue.
    website is on https://www.ionicfirebaseapp.com and blog is on https://www.ionicfirebaseapp.com/blogs/

  • What version of Ghost are you using?
    we tried with latest version of ghost and latest cli and also tried with ghost cli version 1.13.x

  • What configuration?
    we used nginx for proxy naked domain is pointed to our website and /blogs is pointed to ghost blog
    both are running on different ports.

  • What browser?
    we checked it on chrome.

  • What errors or information do you see in the console?
    there is no error but high initial server response time.

  • What steps could someone else take to reproduce the issue you’re having?
    see below nginx config

# here we have redict blocfor http to https
server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name www.ionicfirebaseapp.com;
    # ssl config
    location ^~ /blogs {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $http_host;
        proxy_pass http://127.0.0.1:2368;
        proxy_redirect off;
    }
    location ~ /.well-known {
        allow all;
    }
    location / {
       proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $http_host;
        proxy_pass http://127.0.0.1:1000;
        proxy_redirect off;
    }
    client_max_body_size 99m;
}```