2.1 FYI

Mastering Shiny online book:
- https://mastering-shiny.org
Mastering Shiny Github-repo:
- https://github.com/hadley/mastering-shiny
- By using Github, YOU can contribute too.
DSLC book club Github-repo:
- https://github.com/r4ds/bookclub-mshiny
Shiny Cheat Sheet
- https://shiny.rstudio.com/articles/cheatsheet.html