add grpc server

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

grpc/handler/handler.go

@@ -0,0 +1,22 @@
+package handler
+
+import (
+	"context"
+
+	"github.com/jmoiron/sqlx"
+	pb "github.com/unistack-org/micro-examples/grpc/proto"
+)
+
+type Handler struct {
+	db *sqlx.DB
+}
+
+func NewHandler(db *sqlx.DB) (*Handler, error) {
+	return &Handler{
+		db: db,
+	}, nil
+}
+
+func (h *Handler) Hello(ctx context.Context, req *pb.HelloReq, rsp *pb.HelloRsp) error {
+	return nil
+}