Web APIs with Sinatra, Mongo, Docker, and Caddy
The problem The R community has a package distribution thing called CRAN just like Ruby has Rubygems, and Python has Pypi, etc. On all packages on CRAN, the CRAN maintainers run checks on each package on multiple versions of R and on many operating systems. They report those results on a page associated with the package, like this one. You might be thinking: okay, but we have Travis-CI and friends, so who cares about that?...