Attempt to make a rocket with dynamic mounts

I guess it would be dynamic mounts or dynamic routes.

To restate what I want:
- The `/ls/<path..>` to ONLY be avalible via a debug build
- release builds won't have `/ls/<path..>` mounted

src/main.rs

@@ -1,4 +1,4 @@
-use rocket::{launch, get, routes, fs::FileServer, serde::json::{json, Value}};
+use rocket::{fs::FileServer, get, launch, routes, serde::json::{json, Value}};
 use std::{env, os::unix::fs::MetadataExt, path::PathBuf};
 use std::fs::read_dir;
 use humansize::{format_size, DECIMAL};