chore: remove dbport from command flag

cmd/root.go

@@ -30,7 +30,6 @@ func Execute() {
 
 func init() {
 	rootCmd.PersistentFlags().StringP("dbname", "d", "", "Database name")
-	rootCmd.PersistentFlags().IntP("port", "p", 5432, "Database port")
 	rootCmd.AddCommand(VersionCmd)
 	rootCmd.AddCommand(BackupCmd)
 	rootCmd.AddCommand(RestoreCmd)