[http.filemanager] New development workflow

(1138-4EB) #1

We recently split filemanager (renamed to filebrowser) in two repositories: filebrowser and frontend. Now frontend is a submodule of filebrowser. We want to further split the caddy related codebase to a new repo. However, in order to do so we need to know whether it is possible to add specific files to the build pipeline in the Caddy server. The scheme from Caddy’d point of view would be to clone a repo recursively and wget a single file. That file corresponds to the artifacts of the frontend that have been packed with rice-box.