From binder to the Shiny app directly

[tom-gu]

Can be really cool and incredibly useful 😍

By having it in all the three app repos (bddwc.app; bdchecks.app; bdclean), we can preserve bdverse as an RStudio instance.

[tom-gu]

• To create an R-services brunch for shinyapp.io, and to test shiny-binder on this brunch
  @thiloshon @rahulchauhan049