title: how to add R package documentation to rdocumentation.org?
body: <p>I found the <a href="https://www.rdocumentation.org/" rel="nofollow noreferrer">rdocumentation.org</a> is a website that has the HTML documentation of many R packages, but I was confused about how it works. </p>
  
  <p>Given I have an R package on GitHub, how can I have my .Rd documentation (written with Roxygen2) of this package could be searched in rdocumentation.org?</p>