catalog update

http/catalog.go

@@ -9,12 +9,12 @@ type GetProductRequest struct {
 }
 
 type GetProductResponse struct {
-	ID        int           `db:"id"`
+	ID        int           `json:"id"`
-	PID       string        `db:"pid"`
+	PID       string        `json:"pid"`
-	Name      string        `db:"name"`
+	Name      string        `json:"name"`
-	Price     float64       `db:"price"`
+	Price     float64       `json:"price"`
-	CreatedAt time.Duration `db:"created_at"`
+	CreatedAt time.Duration `json:"created_at"`
-	UpdatedAt time.Duration `db:"updated_at,omitempty"`
+	UpdatedAt time.Duration `json:"updated_at,omitempty"`
 }
 
 type GetProductListRequest struct {