R set to 4.0.5

Dockerfile

@@ -1,15 +1,14 @@
-FROM rocker/shiny
+FROM rocker/shiny:4.0.5
 LABEL authors="Roy Francis"
 ARG REPO="royfrancis/shiny-rnaseq-power"
 
 RUN apt-get update && \
     apt-get upgrade -y && \
     apt-get clean && \
-    apt-get install -y git libxml2-dev libudunits2-dev && \
+    apt-get install -y git && \
     rm -rf /var/lib/apt/lists/*
 
-RUN Rscript -e 'install.packages(c("BiocManager","shinyBS","shinythemes"));
-		BiocManager::install("RNASeqPower")'
+RUN Rscript -e 'install.packages(c("BiocManager","shinyBS","shinythemes"),repo="https://cloud.r-project.org/");BiocManager::install("RNASeqPower")'
 
 RUN cd /srv/shiny-server/ && \
     git clone https://github.com/${REPO}.git app && \