Hwo to place advertisement on download page of nextlcoud

I am new to nextcloud, I want to know where the download file exists, I want to add an advertisement code to the download page, as shown in the screenshot.

example download page: https://clouds.example.com/s/ppRHNQA2M3esTMK

anyone can help me?

Thank you

Here I believe, but you’ll have to customize/replace/integration your changes it every time you upgrade:

For something more manageable, you’d probably want to build an add-on app.

thanks for the reply. I am not a developer, I can’t develop apps by myself.

I will add the ads code manually.

I need a public share app with domain restriction if any developer is interested. I will guide him and show him a live example.