Update Dockerfile

rdocker/Dockerfile

@@ -1,7 +1,7 @@
 # Use the official Ubuntu image as the base
 FROM ubuntu:20.04
 
-# Install system dependencies and R
+# Install system dependencies
 RUN apt-get update && apt-get install -y \
     libcurl4-openssl-dev \
     libxml2-dev \
@@ -12,12 +12,22 @@ RUN apt-get update && apt-get install -y \
     libgmp-dev \
     libgit2-dev \
     gfortran \
-    && apt-get install -y --no-install-recommends r-base \
+    software-properties-common \
     && rm -rf /var/lib/apt/lists/*
 
-# Install R packages from CRAN and Bioconductor
-RUN R -e "install.packages(c('ggplot2', 'scales', 'gtable', 'grid'), repos='http://cran.rstudio.com/')" \
-    && R -e "if (!require('BiocManager', quietly = TRUE)) install.packages('BiocManager'); BiocManager::install('DNAcopy', update = TRUE, ask = FALSE)"
+# Add CRAN repository and install R base version 4.4.0
+RUN apt-key adv --keyserver keyserver.ubuntu.com --recv-keys E084DAB9 \
+    && add-apt-repository 'deb https://cloud.r-project.org/bin/linux/ubuntu focal-cran40/' \
+    && apt-get update \
+    && apt-get install -y --no-install-recommends r-base=4.4.0-1.2004.0 \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install R packages from CRAN
+RUN R -e "install.packages(c('ggplot2', 'scales', 'gtable', 'grid'), repos='http://cran.rstudio.com/')"
+
+# Install Bioconductor and DNAcopy package
+RUN R -e "install.packages('BiocManager', repos='http://cran.rstudio.com/')" \
+    && R -e "BiocManager::install('DNAcopy', update = TRUE, ask = FALSE)"
 
 # Set the working directory (optional)
 WORKDIR /app