redirect https non-www to https www for nginx django

Question

I tried many solutions but nothing worked. I am trying to redirect https://example.com to https://www.example.com. If I write https://example.com in the address bar, I get an insecure website prompt. I have ssl certificate installed for www.example.com. Here's the code from nginx server:

server {
    server_name exmaple.com www.exmaple.com;

    location ~ ^/.well-known {
        root /home/xyz/xyz-dir;
        allow all;
    }
    location = /favicon.ico { access_log off; log_not_found off; }
    location /static/ {
        root /home/xyz/xyz-dir;
    }
    location /media/ {
        root /home/xyz/xyz-dir;
    }
    location / {
        include proxy_params;
        proxy_pass http://unix:/run/gunicorn.sock;
    }

    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/www.exmaple.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/www.exmaple.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 ($host = www.exmaple.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

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

    listen 80;
    server_name exmaple.com www.exmaple.com;
    return 404; # managed by Certbot

}

Answer 1

use location ~ instead of location /

as you commented it's not work: updated

use bellow links:

https://nginx.viraptor.info/

https://nginxconfig.org/

as you can see here

although browsers redirect http to https, you should add:

# HTTP redirect
server {
    listen      80;
    listen      [::]:80;
    server_name .example.com;
    include     nginxconfig.io/letsencrypt.conf;

    location / {
        return 301 https://example.com$request_uri;
    }
}

maybe your problem will solved by this:

https://stackoverflow.com/a/54859776/5987259