First implementation of fetching collections of book managed by user

internal/db/init.go

@@ -22,6 +22,7 @@ func Initdb(databasePath string, demoDataPath string) *gorm.DB {
 	db.AutoMigrate(&model.User{})
 	db.AutoMigrate(&model.UserBook{})
 	db.AutoMigrate(&model.StaticFile{})
+	db.AutoMigrate(&model.Collection{})
 	var book model.Book
 	queryResult := db.Limit(1).Find(&book)
 	if queryResult.RowsAffected == 0 && demoDataPath != "" {