feat: domain finished

domain/entity/book/book.go

@@ -0,0 +1,18 @@
+package book
+
+import (
+	"time"
+
+	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+)
+
+//Book data
+type Book struct {
+	ID        entity.ID
+	Title     string
+	Author    string
+	Pages     int
+	Quantity  int
+	CreatedAt time.Time
+	UpdatedAt time.Time
+}