Automigrate when opening db

internal/db/paste_test.go

@@ -13,6 +13,10 @@ func OpenTemporaryDB() (*Database, error) {
 	if err != nil {
 		return nil, err
 	}
+	migrate := Gormigrate(db)
+	if err := migrate.Migrate(); err != nil {
+		return nil, err
+	}
 	return db, nil
 }