Echo data path on startup

.gitignore

@@ -7,3 +7,4 @@ webui/node_modules/
 webui/dist/
 Cargo.lock
 config.json
+docker/data/

src/main.rs

@@ -233,6 +233,7 @@ async fn main() -> std::io::Result<()> {
     ).bind(("0.0.0.0", port))?.run();
 
     println!("Server started: http://0.0.0.0:{}", port);
+    println!("Data path is set to {}", args.path);
     if args.https {
         println!("Note: gree is set to https mode. http requests will fail on jp clients.");
     }