build_tutorials: Build tutorials section
In Paradigm4/pkgdown: Make Static HTML Documentation for a Package

learnr tutorials must be hosted elsewhere as they require an R execution engine. Currently, pkgdown will not build or publish tutorials for you, but makes it easy to embed (using <iframe>s) published tutorials. Tutorials are automatically discovered from published tutorials in inst/tutorials and vignettes/tutorials. Alternatively, you can list in _pkgdown.yml as described below.

1	build_tutorials(pkg = ".", override = list(), preview = NA)

`pkg`	Path to package.
`override`	An optional named list used to temporarily override values in `_pkgdown.yml`
`preview`	If `TRUE`, or `is.na(preview) && interactive()`, will preview freshly generated section in browser.

To override the default discovery process, you can provide a tutorials section. This should be a list where each element specifies:

name: used for the generated file name
title: used in page heading and in navbar
url: which will be embedded in an iframe
source: optional, but if present will be linked to

tutorials:
- name: 00-setup
  title: Setting up R
  url: https://jjallaire.shinyapps.io/learnr-tutorial-00-setup/
- name: 01-data-basics
  title: Data basics
  url: https://jjallaire.shinyapps.io/learnr-tutorial-01-data-basics/