strapi/packages/strapi-generate-admin/files/admin/public/docs/general/server-configs.md

Server Configurations

Apache

This boilerplate includes a .htaccess file that does two things:

1. Redirect all traffic to HTTPS because ServiceWorker only works for encrypted traffic.
2. Rewrite all pages (e.g. yourdomain.com/subpage) to yourdomain.com/index.html to let react-router take care of presenting the correct page.

Note: For performance reasons you should probably adapt it to run as a static .conf file (typically under /etc/apache2/sites-enabled or similar) so that your server doesn't have to apply its rules dynamically per request)

Nginx

Also it includes a .nginx.conf file that does the same on Nginx server.