(** Server startup.

    Loads configuration, then hands the resulting routes to Dream. Startup fails
    loudly rather than falling back to defaults, so a typo in a config file is
    noticed immediately instead of silently changing which repositories are
    served. The one exception is an explicit [git_project_root] on the command
    line, which is enough on its own to run without any config file. *)

val run : ?git_project_root:string -> unit -> unit
(** Load configuration and start the HTTP server. When [git_project_root] is
    provided it overrides the configured value (and suppresses the startup
    failure when no config file exists). Does not return under normal operation.
*)