initial gRPC testing

cmd/reactor/main.go

@@ -10,7 +10,7 @@ import (
 
 func main() {
     fmt.Println("running")
-    lis, err := net.Listen("tcp", "localhost:2000")
+    lis, err := net.Listen("tcp", "192.1.168.156:2000")
     if err != nil {
         fmt.Println(err)
     }