Create basic CDN endpoints for #10

cdn/src/robocraft/live_data.rs

@@ -3,5 +3,6 @@ use actix_web::{get, Responder, web::Data};
 #[get("/live/data.json")]
 pub async fn live_data_json(cli: Data<crate::cli::CliArgs>) -> impl Responder {
     let path = std::path::PathBuf::from(&cli.assets_robocraft).join("live_data.json");
+    log::debug!("RC asset at {} (exists? {})", path.display(), path.exists());
     actix_files::NamedFile::open_async(path).await
 }