Custom landing page

[kercsoj]

Hi Gitbook Team

I am working on setting up Gitbook for our organization. What I would like to achieve is a landing page similar to https://docs.github.com/en:

• a banner on the top with a text overlay
• multicolumn text containing links

I checked the documentation of Gitbook carefully, but I didn't find a way to achieve my goal. I tried to import an html page with three columns, but it didn't work either.

Can you please tell me, how can I have the above mentioned layout with Gitbook?

Thanks,
Jozsef