Update R version
Update R version

FROM r-base:3.4.1
LABEL maintainer="joelnbarnham@gmail.com"

RUN \
Rscript -e "install.packages('ggplot2')" && \
Rscript -e "install.packages('randomForest')" && \
:

FROM r-base:4.1.3
LABEL maintainer="joelnbarnham@gmail.com"

RUN \
Rscript -e "install.packages('ggplot2')" && \
Rscript -e "install.packages('randomForest')" && \
:
