added MigrateStructure to SetupCheck

split the MigrateStructure to be handled in each package seperately

backend/database/database.go

@@ -0,0 +1,9 @@
+package database
+
+func MigrateStructure() error {
+	err := DB.AutoMigrate()
+	if err != nil {
+		return err
+	}
+	return nil
+}