diff --git a/action.yml b/action.yml
new file mode 100644
index 0000000..d3d23f6
--- /dev/null
+++ b/action.yml
@@ -0,0 +1,6 @@
+# action.yml
+name: 'Hub'
+description: 'Run go hub'
+runs:
+  using: 'docker'
+  image: 'dev.dockerfile'
\ No newline at end of file
diff --git a/dev.dockerfile b/dev.dockerfile
new file mode 100644
index 0000000..a33c715
--- /dev/null
+++ b/dev.dockerfile
@@ -0,0 +1,5 @@
+FROM debian:10-slim
+
+EXPOSE 50051
+COPY ./hub /hub
+ENTRYPOINT ["/hub", "serve", "--dev"]
diff --git a/main.go b/main.go
index 64792ca..1084f35 100644
--- a/main.go
+++ b/main.go
@@ -150,6 +150,7 @@ func main() {
 		reflection.Register(s.GrpcServer)
 
 		log.Printf("listening on %s\n", l.Addr().String())
+		log.Println(s.Args)
 		if err := s.GrpcServer.Serve(l); err != nil {
 			log.Fatalf("failed to serve: %v", err)
 		}
diff --git a/server/search.go b/server/search.go
index d621f0f..33a0915 100644
--- a/server/search.go
+++ b/server/search.go
@@ -159,6 +159,7 @@ func (s *Server) Search(ctx context.Context, in *pb.SearchRequest) (*pb.Outputs,
 		esUrl := s.Args.EsHost + ":" + s.Args.EsPort
 		tmpClient, err := elastic.NewClient(elastic.SetURL(esUrl), elastic.SetSniff(false))
 		if err != nil {
+			log.Println(err)
 			return nil, err
 		}
 		client = tmpClient
@@ -444,6 +445,7 @@ func (s *Server) Search(ctx context.Context, in *pb.SearchRequest) (*pb.Outputs,
 
 	searchResult, err := search.Do(ctx) // execute
 	if err != nil {
+		log.Println(err)
 		return nil, err
 	}