Easily use 'Bootstrap' icons inside 'Shiny' apps and 'R Markdown' documents. More generally, icons can be inserted in any 'htmltools' document through inline 'SVG'.
An R package for using Bootstrap icons in Shiny and R Markdown
Install the stable release of bsicons on CRAN:
install.packages("bsicons")
bsicons::bs_icon("geo", size = "3rem")