Package index.html pages in repository

Hi,

I am hosting a small repository (of partly non-public repositories) and was
wondering if it is possible to create the package-index page on CRAN (e.g.
here for drat https://cran.rstudio.com/web/packages/drat/drat.pdf)

automatically somehow out of an existing repo (i.e. create the package from
the descriptions, extract the manual, extract the vignette, link them etc.).

Thanks!

Holger