Make pool and poolSong global variables

internal/db/dbHelper.go

@@ -76,7 +76,9 @@ func ResetGameIdSeq() {
 }
 
 func createDb(host string, port string, user string, password string, dbname string) {
-	conninfo := fmt.Sprintf("host=%s port=%s user=%s password=%s sslmode=disable", host, port, user, password)
+	// Connect to the default postgres database to create new database
+	// In PostgreSQL, we need to connect to an existing database (postgres) to create a new one
+	conninfo := fmt.Sprintf("host=%s port=%s user=%s password=%s dbname=postgres sslmode=disable", host, port, user, password)
 	db, err := sql.Open("postgres", conninfo)
 	defer db.Close()
 
@@ -102,18 +104,6 @@ func Migrate_db(host string, port string, user string, password string, dbname s
 		logging.GetLogger().Error("Failed to open database for migration", zap.String("error", err.Error()))
 	}
 
-	_, err = db.Query("select * from game")
-	if err != nil {
-		logging.GetLogger().Warn("Game table not found, creating database", zap.String("error", err.Error()))
-		createDb(host, port, user, password, dbname)
-
-		db, err = sql.Open("postgres", migrationInfo)
-		if err != nil {
-			logging.GetLogger().Fatal("Failed to reconnect after database creation", zap.String("error", err.Error()))
-		}
-
-	}
-
 	driver, err := postgres.WithInstance(db, &postgres.Config{})
 	if err != nil {
 		logging.GetLogger().Error("Failed to create migration driver", zap.String("error", err.Error()))