r markdown – How to create a master html file above the output directory from rmarkdown::render_site

When using rmarkdown::render_site, it render the Rmd files to Html into the same directories.

Is it possible to create a master html file? When opening, it will directly link to the index.html in the output directory?

- Master.html # create this file
    - (output directory)
    - Index.html
    - Data1.html
    - Data2.html