Editar pagina de acceso a offmeet

hello Sorry someone can help me I need to change the ofmeet tab https: // your server: 7443 / ofmeet / on that page is where we put the name of the video conference room that we want to access and click on go I want to personalize it remove the blue background and the circles but I do not know what the file is or how to remove it please someone to help me or advise me
I have installed openfire 4.2.3 in windows 7

I am afraid you can’t do that easily. The whole jitsi-meet web application is bundled into a war file and expanded into a folder in /tmp on your openfire server. Even if you find the folder, the HTML is embeded in JavaScript. It is minimised and obfuscated.