Test copy of WordPress site

What can we do to get a test copy of a WordPress droplet?

I have scoured the documents and attempted many ways of configuring a WordPress droplet copy to run a test version of a WordPress site. I can’t get the test site to support logging in on /wp-admin . The following steps seem to work but then the site goes down. After logging in to /wp-admin

Steps:

1. Get a free domain on no-ip.com (e.g. example.com)
2. Create droplet from snapshot in Digital Ocean
3. Copy the droplet IP to the domain in no-ip.com
4. Open console of new droplet and follow the installation prompts
5. After the installation, copy the 2 following lines to wp-config.php:

define( 'WP_HOME', 'http://example.com' );
define( 'WP_SITEURL', 'http://example.com' );

6. Restart apache with

systemctl restart apache2.service

7. Configure let’s encrypt for the new domain

a. Enter the command in the droplet console:

certbot --apache -d example.com

b. Reference:

https://www.digitalocean.com/community/tutorials/how-to-secure-nginx-with-let-s-encrypt-on-ubuntu-20-04

8. Update site settings in wordpress database In the Digital Ocean console

    a. mysql -u root -p
   
    b. select * from wordpress.wp_options where option_name = 'siteurl';
   
    c. select * from wordpress.wp_options where option_name = 'home';
   
    d. update wordpress.wp_options set option_value = 'http://example.com' where option_name = 'siteurl';
   
    e. update wordpress.wp_options set option_value = 'http://example.com' where option_name = 'home';
   
            f. update wordpress.wp_options set option_value = replace(option_value, "oldurl.com", "example.com");
   

Anything else we can try to get a test copy of a WordPress droplet?

Cheers