create categories and subcategories in database and categories logic

backend/database/db.go

@@ -43,4 +43,11 @@ func InitDatabase() {
 			CreateUser(&allusers[i])
 		}
 	}
+
+	if os.Getenv("DEFAULT_CATEGORIES_FILE") != "" {
+		default_categories := GetCategoriesFromFile(os.Getenv("DEFAULT_CATEGORIES_FILE"))
+		for i := range default_categories {
+			CreateCategory(&default_categories[i])
+		}
+	}
 }