debynory Flarum installs via a tool called Composer, which we use to help alleviate the need to maintain a separate installation script for Flarum. We're aware that many people are interested in a solution to use via FTP, but that won't be addressed by the team before stable.
You can always find the latest installation instructions on our docs, and we're willing to help you if you get stuck (open a new discussion in our Support tag). Just make sure your host fulfills the minimum requirements for Flarum.
