Add swap (walkthrough):
sudo fallocate -l 4G /swapfile
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile
sudo swapon -s
start up docker:
sudo docker run -d -p 8787:8787 rocker/hadleyverse
browse to <ip>
:8787
Add users
docker ps
docker exec -it 0940cb1d9983 bash
install: htmlwidgets, DiagrammeR, leaflet