feat(refactor): update basic grpc method

proto/helloworld.proto

@@ -1,15 +0,0 @@
-syntax = "proto3";
-
-package helloworld;
-
-service Greater {
-  rpc SayHello (HelloRequest) returns (HelloResponse);
-}
-
-message HelloRequest {
-  string name = 1;
-}
-
-message HelloResponse {
-  string message = 1;
-}

proto/juno.proto

@@ -0,0 +1,14 @@
+syntax = "proto3";
+
+package juno;
+
+service JunoRequest {
+  rpc Ping (PingRequestMessage) returns (PingResponseMessage);
+}
+
+message PingRequestMessage {
+}
+
+message PingResponseMessage {
+  string message = 1;
+}