Indy 10 web server not showing pages correctly

I'm trying to make a web server with TIdHTTPServer and so far it can display normal html pages. I want it to load this https://github.com/Facepunch/webrcon/tree/gh-pages site but It doesn't display it like it should be. A while back I made a web server with delphi 10 using the TcpServer component and that displays the site as it should be displayed but that component is no longer available in Rad Studio 10.2.2.

This is the following code for the command get event:

procedure Tfrmmain.idhtpsrvr1CommandGet(AContext: TIdContext;
  ARequestInfo: TIdHTTPRequestInfo; AResponseInfo: TIdHTTPResponseInfo);
begin
  with TStringList.Create do
    begin
      LoadFromFile('htdocs\index.html');
      AResponseInfo.ContentText := Text;
      Free;
    end;
end;

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I never use indy so if anyone can help I would be great full.