move protos to specical directory

service/echo/v1/echo.go

@@ -0,0 +1,27 @@
+package echo
+
+import (
+	"context"
+
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"google.golang.org/protobuf/types/known/timestamppb"
+
+	pb "github.com/esinio/geco/gen/proto/echo/v1"
+)
+
+type Service struct {
+	*pb.UnimplementedEchoServiceServer
+}
+
+func (s *Service) Echo(ctx context.Context, req *pb.StringMessage) (*pb.StringMessage, error) {
+	if req.Value == "" {
+		return nil, status.Errorf(codes.Unimplemented, "value is empty")
+	}
+	return &pb.StringMessage{
+		Value:     req.Value,
+		Timestamp: timestamppb.Now(),
+	}, nil
+
+	// return nil, status.Errorf(codes.Unimplemented, "method Echo not implemented")
+}