How to show the output of batch file on inno setup installer?

I know this has been answered before, but it didn't work for me.

I m trying to install the app once the app is installed I have a batch file in the same directory with docker commands which need to be run in order to create the container images.

I tried the below code at the end of my installer, but it's not running the batch file.

This is my first time with pascal script I m python newbie trying the docker app first time with the package installer any help or guidance?

[Code]

var
  ProgressPage: TOutputProgressWizardPage;
  ProgressListBox: TNewListBox;

function SetTimer(
  Wnd: LongWord; IDEvent, Elapse: LongWord; TimerFunc: LongWord): LongWord;
  external 'SetTimer@user32.dll stdcall';
function KillTimer(hWnd: LongWord; uIDEvent: LongWord): BOOL;
  external 'KillTimer@user32.dll stdcall';

var
  ProgressFileName: string;

function BufferToAnsi(const Buffer: string): AnsiString;
var
  W: Word;
  I: Integer;
begin
  SetLength(Result, Length(Buffer) * 2);
  for I := 1 to Length(Buffer) do
  begin
    W := Ord(Buffer[I]);
    Result[(I * 2)] := Chr(W shr 8); { high byte }
    Result[(I * 2) - 1] := Chr(Byte(W)); { low byte }
  end;
end;

procedure UpdateProgress;
var
  S: AnsiString;
  I, L, Max: Integer;
  Buffer: string;
  Stream: TFileStream;
  Lines: TStringList;
begin
  if not FileExists(ProgressFileName) then
  begin
    Log(Format('Progress file %s does not exist', [ProgressFileName]));
  end
    else
  begin
    try
      { Need shared read as the output file is locked for writting, }
      { so we cannot use LoadStringFromFile }
      Stream := TFileStream.Create(ProgressFileName, fmOpenRead or fmShareDenyNone);
      try
        L := Stream.Size;
        Max := 100*2014;
        if L > Max then
        begin
          Stream.Position := L - Max;
          L := Max;
        end;
        SetLength(Buffer, (L div 2) + (L mod 2));
        Stream.ReadBuffer(Buffer, L);
        S := BufferToAnsi(Buffer);
      finally
        Stream.Free;
      end;
    except
      Log(Format('Failed to read progress from file %s - %s', [
                 ProgressFileName, GetExceptionMessage]));
    end;
  end;

  if S <> '' then
  begin
    Log('Progress len = ' + IntToStr(Length(S)));
    Lines := TStringList.Create();
    Lines.Text := S;
    for I := 0 to Lines.Count - 1 do
    begin
      if I < ProgressListBox.Items.Count then
      begin
        ProgressListBox.Items[I] := Lines[I];
      end
        else
      begin
        ProgressListBox.Items.Add(Lines[I]);
      end
    end;
    ProgressListBox.ItemIndex := ProgressListBox.Items.Count - 1;
    ProgressListBox.Selected[ProgressListBox.ItemIndex] := False;
    Lines.Free;
  end;

  { Just to pump a Windows message queue (maybe not be needed) }
  ProgressPage.SetProgress(0, 1);
end;

procedure UpdateProgressProc(
  H: LongWord; Msg: LongWord; Event: LongWord; Time: LongWord);
begin
  UpdateProgress;
end;

procedure BotonIniciarOnClick(Sender: TObject);
var
  ResultCode: Integer;
  Timer: LongWord;
  AppPath: string;
  AppError: string;
  Command: string;
begin
  ProgressPage :=
    CreateOutputProgressPage(
      'Installing something', 'Please wait until this finishes...');
  ProgressPage.Show();
  ProgressListBox := TNewListBox.Create(WizardForm);
  ProgressListBox.Parent := ProgressPage.Surface;
  ProgressListBox.Top := 0;
  ProgressListBox.Left := 0;
  ProgressListBox.Width := ProgressPage.SurfaceWidth;
  ProgressListBox.Height := ProgressPage.SurfaceHeight;

  { Fake SetProgress call in UpdateProgressProc will show it, }
  { make sure that user won't see it }
  ProgressPage.ProgressBar.Top := -100;

  try
    Timer := SetTimer(0, 0, 250, CreateCallback(@UpdateProgressProc));

    ExtractTemporaryFile('Commands.bat');
    AppPath := ExpandConstant('{tmp}\Commands.bat');
    ProgressFileName := ExpandConstant('{tmp}progress.txt');
    Log(Format('Expecting progress in %s', [ProgressFileName]));
    Command := Format('""%s" > "%s""', [AppPath, ProgressFileName]);
    if not Exec(ExpandConstant('{cmd}'), '/c ' + Command, '', SW_HIDE,
         ewWaitUntilTerminated, ResultCode) then
    begin
      AppError := 'Cannot start app';
    end
      else
    if ResultCode <> 0 then
    begin
      AppError := Format('App failed with code %d', [ResultCode]);
    end;
    UpdateProgress;
  finally
    { Clean up }
    KillTimer(0, Timer);
    ProgressPage.Hide;
    DeleteFile(ProgressFileName);
    ProgressPage.Free();
  end;

  if AppError <> '' then
  begin 
    { RaiseException does not work properly while TOutputProgressWizardPage is shown }
    RaiseException(AppError);
  end;
end;