Using git (hopefully), deploy the Phin site to a server. Run standard production installs for composer deps, node modules, and compile assets with gulp.
Because the Phin site doesn’t have an index.php at the root of the repo, the easiest way to set it up is to have a git post-receive hook checkout the project (outside of public_html) to ~/projects/my-site and then create a sym-link from public_html or public_html/my-sub-site to ~/projects/my-site/public. This is possible to do on shared and private hosting and doesn’t expose any site files (outside of my-site/public) to viewers.