R version 3.6.1

Updated base image to rocker/tidyverse:3.6.1

rocker/tidyverse:3.6.0

• Updated image to rocker/tidyverse:3.6.0 (R version 3.6.0)
• Modified template project (fleshed out default files, ProjectTemplate v0.9.0 global.dcf)
• Updated README.md
• Updated instructions on how to enable SSL encryption in nginx.conf (disabled by default)
• Changed docker-compose network from tki-net to net
• Added .Rbuildignore to template project

rocker/tidyverse:3.5.2

RStudio base image: rocker/tidyverse:3.5.2