https://support.rstudio.com/hc/en-us/articles/200526207-Using-RStudio-Projects
https://swcarpentry.github.io/r-novice-gapminder/02-project-intro/
https://sphweb.bumc.bu.edu/otlt/MPH-Modules/BS/R/R1_GettingStarted/R1_GettingStarted8.html