Increase file upload size in Nginx and PHP

Change the nginx config file.

sudo nano /etc/nginx/nginx.conf

# In the http block, add the max body size.
http {
    // other config
    client_max_body_size 100M;
}

Check the configuration.

sudo nginx -t

Change config in php.ini file

sudo nano /etc/php/8.2/fpm/php.ini

# Change the following lines 
upload_max_filesize = 100M  ; Maximum upload file size
post_max_size = 100M       ; Maximum size of POST data

Once it is done, restart the php-fpm

sudo systemctl restart php8.2-fpm

Replace php8.2 with the version you installed on your server.