WordPress 4.8.2 redirects back after install and asks to delete/change config

from: https://stackoverflow.com/questions/32686663/error-the-file-wp-config-php-already-exists

Is just a browser cache.

On first URL load, you are redirected from domain.ext to
domain.ext/wp-admin/setup-config.php

If you are on Chrome, just open the developers console, go to
“Network” tab. Reload the page and right click anywhere in the
console, and hit “Clear browser cache”.

Now refresh again and you will see your website