app/drk: set url to public darkfid instance

bin/app/src/plugin/drk.rs

@@ -39,7 +39,9 @@ use crate::{
     ExecutorPtr,
 };
 
-const DARKFID_ENDPOINT: &str = "tcp://127.0.0.1:18345"; // TODO: should be configurable at runtime
+// TODO: should be configurable at runtime
+//const DARKFID_ENDPOINT: &str = "tcp://127.0.0.1:18345";
+const DARKFID_ENDPOINT: &str = "tcp://node0.dark.fi:18340";
 const DARKFID_RETRY_TIME: u64 = 20;
 
 #[cfg(target_os = "android")]