Moving To Root Folder

You can keep it in the /wordpress folder on the server, but point your main site to it by following these instructions:

https://codex.www.ads-software.com/Giving_WordPress_Its_Own_Directory#Using_a_pre-existing_subdirectory_install

If you really want to move it on the server, you can do that too. You’ll have to change the WordPress Address (URL) and Site Address (URL) to https://www.yoursite.com first. Once you save that setting, you might get some error message that the site can’t be found, but that’s ok. After this, you can move all files to the root of your server.

Where do I change the wordpress address and site address urls?

After you log in to your WordPress admin you can make the change under Settings / General.

And, like Sneff stated, once you make the change and save the changes you will get an error (probably 500 Internal Server Error). Just go ahead and move your install files from the wordpress directory to the root of your domain.

You will then be able to log back into the admin through https://yourdomainname.com/wp-login.php instead of the https://yourdomainname.com/wordpress/wp-login.php